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All Journal CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Jurnal Kimia (Journal of Chemistry) Itepa : Jurnal Ilmu dan Teknologi Pangan Jurnal Media Sains

Anak Agung Istri Agung Mayun Laksmiwati

Progam Studi Kimia Fakultas Matematika Dan Ilmu Pengetahuan Alam Universitas Udayana

Author-ID : 304285

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Electrical & Electronics Engineering Immunology & microbiology Medicine & Pharmacology

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Aktivasi Batu Padas dengan Asam dan Pemanfaatannya sebagai Penyerap Limbah Deterjen Laksmiwati, A.A.I.A Mayun; Suarya, Putu
Jurnal Media Sains Vol 1, No 1 (2017): JURNAL MEDIA SAINS
Publisher : LPPM Universitas Dhyana Pura

ABSTRAKIndustri pembuatan patung yang berkembang pesat di beberapa daerah di Pulau Bali, telah banyak menghasilkan limbah, khususnya berupa butiran-butiran batu padas. Limbah tersebut selama ini terbuang begitu saja dan keberadaannya telah mencemari lingkungan. Padahal, limbah batu padas tersebut memiliki potensi untuk dijadikan sebagai adsorben limbah cair. Melalui metode aktivasi, baik itu secara fisika maupun secara kimia, peningkatan kapasitas adsorpsi batu padas dapat tercapai. Tujuan umum dari penelitian ini adalah untuk mendayagunakan limbah batu padas sisa pembuatan patung sebagai adsorben untuk mengatasi pencemaran limbah deterjen. Kemampuan batu padas untuk mengadsorpsi deterjen diuji dengan menggunakan metode Batch. Pengaruh pH dan waktu kontak adsorpsi dipelajari untuk mengoptimasi proses adsorpsi dan aktivasi batu padas secara kimia untuk mendapatkan adsorben dengan kapasitas adsorpsi optimum. Model isotermal Langmuir digunakan untuk menentukan isoterm adsorpsi ini. Hasil karakterisasi terhadap luas permukaan batu padas menunjukkan, batu padas teraktivasi asam sulfat memiliki karakter terbaik dengan luas permukaan spesifik paling besar yakni 18,2423 m2/g dibanding dengan batu padas teraktivasi asam klorida 17,0122 m2/g dan batu padas alam sebesar 16,6568 m2/g . Hasil uji adsorpsi batu padas terhadap limbah deterjen menunjukkan pada kajian variasi waktu kontak, adsorpsi optimum batu padas alam (BA) sebesar 4,6934 mg/g, batu padas teraktivasi asam sulfat (BAS) sebesar 4,9191 mg/g dan batu padas teraktivasi asam klorida (BAK) sebesar 4,9693 mg/g.Kata kunci : Aktivasi, Batu Padas, adsorpsi, limbah deterjen.ABSTRACTWaste of making sculpture in the form of granules rocks during this time wasted and presence has polluted the environment. These rocks will be used as adsorbent through the activation process, activation either physically or chemically to increase the adsorption capacity. This adsorbent is an industrial waste material in the manufacture of statues are numerous in the home industry in some areas on the island of Bali. The general objective of this study was to utilize the residual waste rocks making sculpture as an adsorbent to address waste pollution detergent. The ability of rocks to adsorb detergents tested using Batch. Effect of pH and contact time of adsorption was studied to optimize the process of adsorption and activation rocks chemically to obtain optimum adsorbent with adsorption capacity. Langmuir isotherm models used to determine the adsorption isotherm. The results of the characterization of the surface area of the rocks show, rocks activated sulfuric acid has the best character with most large specific surface area which is 18.2423 m2/g compared with limestone activated hydrochloric acid 17.0122 m2/g and a natural limestone by 16.6568 m2/g. The test results of the waste rocks adsorption detergents showed the study of variation of contact time, the adsorption optimum natural limestone (BA) of 4.6934 mg/g, rocks activated sulfuric acid (BAS) of 4.9191 mg/g and rocks activated acid chloride (BAK) of 4.9693 mg/g.Key words : Activation, Batu padas, adsorption, waste detergent

Aktivitas Proteolitik Buah Mangga Bacang (Mangifera Foetida) Dan Umbi Keladi Tikus (Typhonium Divaricatum) Dibandingkan Dengan Proteolitik Buah Nanas (Ananas Comosus) Noviana Dewi, Ni Luh Made; Laksmiwati, A. A. I. A. Mayun; Ariati, Ni Komang
Jurnal Media Sains Vol 2, No 1 (2018): JURNAL MEDIA SAINS
Publisher : LPPM Universitas Dhyana Pura

ABSTRAKBuah nanas (Ananas Comosus) mengandung enzim bromelin yang dapat menimbulkan rasa gatal dan menyebabkan iritasi. Beberapa tumbuhan lain yang juga dapat menyebabkan rasa gatal dan mengakibatkan iritasi seperti mangga bacang (Mangifera Foetida), dan keladi tikus (Typhonium Divaricatum). Adanya rasa gatal kemungkinan besar disebabkan dengan adanya enzim proteolitik. Tujuan penelitian ini adalah uji aktivitas enzim proteolitik pada buah mangga bacang, dan umbi keladi tikus dibandingkan dengan buah nanas. Uji aktivitas proteolitik dilakukan secara spektrofotometri dengan metode Enggel. Hasil pengujian aktivitas proteolitik menunjukkan bahwa umbi keladi tikus dan buah mangga bacang memiliki aktivitas proteolitik, walaupun nilai aktivitasnya lebih rendah daripada buah nanas. Berdasarkan hasil perhitungan diperoleh aktivitas proteolitik dari buah mangga bacang, dan umbi keladi tikus berturut - turut yaitu 0,199 ? 0,015 U/mL dan 0,184 ? 0,021 U/mL. Perbandingan aktivitas proteolitik buah mangga bacang dan umbi keladi tikus terhadap buah nanas berturut ? turut 1 : 2 dan 2 : 5.Kata Kunci: buah nanas, mangga bacang, keladi tikus, proteolitikABSTRACTPineapple fruit (Ananas Comosus) is known to contain bromelin enzyme that can cause itching and irritation. Some plants that also can cause itching and irritation namely mango bacang (Mangifera Foetida) and keladi tikus (Typhonium Divaricatum). The presence of itching is most likely due to the presence of proteolytic enzyme. The aims of this study was to test the activity of proteolytic enzyme in mango bacang and keladi tikus compared to proteolytic that of in pineapple fruit. Proteolytic activity test was done by spectrophotometry based enggel?s method. The results found that mango bacang and keladi tikus had proteolytic activities, althougt the values of their activities were lower than that of pineapple fruit. The values of proteolytic activities of mango bacang and keladi tikus were 0.199 ? 0.015 U/mL and 0.184 ? 0.021 U/mL respectively. Comparison of proteolytic activity of mango bacang and keladi tikus against of that pineaple were 1 : 2 and 2 : 5, respectively.Keywords: pineapple fruit, mango bacang, keladi tikus, proteolytic

SELULASE DAN AMILASE DARI DAUN LONTAR (Borassus flabelliformis) YANG TELAH LAPUK SERTA UJI INHIBISI DENGAN MINYAK SEREH DAN CENGKEH Ida Bagus Putu Eristya Putra; I Nengah Wirajana; Anak Agung Istri Agung Mayun Laksmiwati
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 7 No 2 (2019): volume 7, Nomor 2, 2019
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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ABSTRAK: Pelapukan naskah lontar salah satunya disebabkan oleh mikroba yang menghasilkan enzim pendegradasi selulosa dan amilum yang terkandung dalam daun siwalan (lontar). Tujuan penelitian ini adalah untuk menentukan aktivitas selulase dan amilase dari mikroba selulolitik dan amilolitik yang diisolasi dari lontar yang telah lapuk, serta mengetahui kemampuan minyak sereh dan cengkeh menginhibisi aktivitas selulase dan amilase dari kedua jenis mikroba tersebut. Isolasi mikroba selulolitik dan amilolitik dari lontar yang telah lapuk dilakukan dengan metode pengenceran dan dikultivasi dalam media yang mengandung substrat spesifik. Substrat carboxymethyl cellulose (CMC) digunakan untuk mikroba selulolitik, sedangkan substrat amilum untuk mikroba amilolitik. Mikroba selulolitik dideteksi dengan adanya zona bening di sekitar koloni mikroba setelah ditambahkan larutan congo red 0,1% (b/v), sedangkan untuk mikroba amilolitik ditambahkan dengan larutan iodin 0,1% (b/v). Aktivitas selulase dan amilase ditentukan berdasarkan gula pereduksi yang dihasilkan dari reaksi enzim-substrat setelah direaksikan reagen dinitro salisilat (DNS) dan ditentukan dengan spektrofotometri UV-Vis. Hasil penelitian diperoleh mikroba selulolitik (C3B) dengan aktivitas selulase sebesar 0,068 U/mL; dan mikroba amilolitik (A5A) dengan aktivitas amilase sebesar 0,827 U/mL. Uji inhibisi menggunakan minyak sereh menunjukkan penurunan aktivitas selulase 4,41% dan penurunan aktivitas amilase 30,96%. Uji inhibisi menggunakan minyak cengkeh menunjukkan penurunan aktivitas amilase 92,50%. Hasil ini mengindikasikan adanya potensi minyak sereh dan cengkeh sebagai bahan untuk konservasi lontar. Kata kunci: inhibitor; aktivitas enzim; selulase; dan amilase ABSTRACT: Weathering of the manuscript was caused by one of the microbes that produced cellulose and starch degrading enzymes contained in the palm-leaf (lontar). The purpose of this study was to determine the activity of cellulase and amylase from cellulolytic and amylolytic microbes isolated from weathered palm, also know the ability of lemongrass and clove oil to inhibit cellulase and amylase activity from both types of microbes. Isolation of cellulolytic and amylolytic microbes from decaying palms was carried out by a dilution method and cultivated in media containing specific substrates. Carboxymethyl cellulose (CMC) substrate is used for cellulolytic microbes, while starch substrates for amylolytic microbes. Cellulolytic microbes were detected by the presence of clear zones around the microbial colonies after adding 0.1% (w/v) congo red solution, while for amylolytic microbes added with 0.1% (w/v) iodine solution. Cellulase and amylase activity was determined based on reducing sugars produced from enzyme-substrate reactions after reacting dinitro salicylate (DNS) reagents and determined by UV-Vis spectrophotometry. The results obtained by cellulolytic microbes (C3B) with cellulase activity of 0.068 U/mL; and amylolytic microbes (A5A) with amylase activity of 0.827 U / mL. Inhibition test using lemongrass oil showed a decrease in cellulase activity 4.41% and decreased amylase activity 30.96%. Inhibition testing using clove oil showed a 92.50% decrease in amylase activity. These results indicate the potential for lemongrass and clove oil as ingredients for palm-leaf conservation.

PENGGUNAAN ENZIM PEPSIN UNTUK PRODUKSI HIDROLISAT PROTEIN KACANG GUDE (Cajanus cajan (L.) Millsp.) YANG AKTIF ANTIOKSIDAN Helen Helda Prastika; Ketut Ratnayani; Ni Made Puspawati; A.A.I.A. Mayun Laksmiwati
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 7 No 2 (2019): volume 7, Nomor 2, 2019
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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ABSTRAK: Penelitian tentang penggunaan enzim pepsin untuk produksi hidrolisat protein kacang gude (Cajanus cajan (L.) Millsp.) yang aktif antioksidan telah dilakukan dengan variasi waktu hidrolisis 0, 30, 60, 90, dan 120 menit. Hidrolisis protein enzimatik merupakan metode yang sangat efisien untuk menghasilkan bioaktif peptida termasuk menunjukkan aktivitas antioksidan. Penelitian ini dilakukan untuk mengetahui konsentrasi asam amino bebas yang dilepaskan selama proses hidrolisis, nilai derajat hidrolisis, aktivitas antioksidan, dan pengaruh waktu hidrolisis terhadap aktivitas antioksidan. Konsentrasi asam amino diukur menggunakan standar asam amino leusin dengan menggunakan spektrofotometer pada ?maks 570 nm dan diperoleh konsentrasi tertinggi hidrolisat protein sebesar 2,4671 mg/mL. Enzim pepsin mampu menghidrolisis protein dengan nilai derajat hidrolisis tertinggi sebesar 23,59%. Aktivitas antioksidan diuji secara in vitro menggunakan radikal DPPH dan diukur pada ?maks 517 nm. Berdasarkan penelitian hidrolisat kacang gude mempunyai aktivitas antioksidan tertinggi sebesar 82,46%. Hasil penelitian menunjukkan adanya pengaruh variasi waktu hidrolisis terhadap terhadap peningkatan jumlah asam amino bebas, nilai derajat hidrolisis, dan aktivitas antioksidan. Diketahui bahwa semakin lama waktu hidrolisis, hasil yang diperoleh semakin meningkat. Hasil tertinggi pada masing-masing proses tersebut terjadi pada waktu 120 menit sehingga hasil dimungkinkan masih dapat meningkat dengan penambahan waktu hidrolisis. Kata kunci: bioaktif peptida, kacang gude, pepsin, derajat hidrolisis, antioksidan ABSTRACT: The study of the effect of pepsin enzyme for the production of pigeon pea (Cajanus cajan (L.) Millsp.) protein hydrolyzate which is active as antioxidants has been carried out with variations in hydrolysis time of 0, 30, 60, 90, and 120 minutes. Enzymatic protein hydrolysis is a very efficient method for producing bioactive peptides and also showing antioxidant activity. This study was conducted to determine the concentration of free amino acids released during the hydrolysis process, the value of hydrolysis degrees, antioxidant activity, and the influence of hydrolysis time on antioxidant activity. Amino acid concentrations were measured using standard amino acid leucine using a spectrophotometer at ?max 570 nm and obtained the highest concentration of protein hydrolyzate at 2,4671 mg / mL. The pepsin enzyme is able to hydrolyze proteins with the highest hydrolysis degree value of 23.59%. Antioxidant activity was tested in vitro using DPPH radical and measured at ?maks 517 nm. Based on the research of pigeon pea hydrolyzate it has the highest antioxidant activity of 82.46%. The results showed the influence of the variation of hydrolysis time on the increase in the number of free amino acids, the value of hydrolysis degrees, and antioxidant activity. It is known that the longer the hydrolysis time, the results obtained increase. The highest results in each of these processes occur at 120 minutes so that the results are possible can still increase with the addition of hydrolysis time.

DISTRIBUSI TIMBAL (Pb) DAN KADMIUM (Cd) PADA BUAH TANAMAN MANGROVE Rhizophora mucronata DI MUARA SUNGAI MATI KABUPATEN BADUNG Ita Hidayatus S; Iryanti Eka Suprihatin; A.A.I.A Mayun Laksmiwati
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 2 No 2 (2014)
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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ABSTRAK: Telah dilakukan penelitian tentang kandungan logam timbal (Pb) dan kadmium (Cd) pada buah mangrove Rhizophora mucronata di muara sungai Mati kabupaten Badung. Penelitian ini bertujuan untuk mengetahui besar akumulasi logam berat pada buah mangrove Rhizophora mucronata dari lingkungannya. Penentuan konsentrasi logam dilakukan dengan menggunakan alat Atomic Absorption Specthtrophotometer (AAS) dengan metode adisi standar. Kandungan Pb dan Cd dalam sampel buah mangrove Rhizophora mucronata berturut-turut yaitu 138,4078 ± 0,8434 mg/kg dan 2,1335 ± 1,0211 mg/kg.ABSTRACT: Research on lead and cadmium contents of Rhizophora mucronata fruits in the estuary of Mati River in the district of Badung, Bali has been conducted. This study was aimed to determine heavy metals accumulation in fruits of Rhizophora mucronata from their environment. The concentrations of Pb and Cd were determined by the use of Atomic Absorption Specthrophotometer followed by a standard addition method. Total concentrations of Pb and Cd in fruits of Rhizophora mucronata were 138,4078 ± 0,8434 mg/kg and 2,1335 ± 1,0211 mg/kg respectively. This finding suggests further exploration considering that the fruits of this plant and other species of mangrove are used as foodstuffs

ANALISIS POTENSI PROTEASE EKTRASELULER TANAH HUTAN MANGROVE PANTAI SUWUNG KAUH BALI Inten Hardianti Nizar; I Nengah Wirajana; A.A.I.A Mayun Laksmiwati
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 3 No 3 (2015)
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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ABSTRAK: Potensi tanah hutan mangrove pantai Suwung Kauh Bali sebagai sumber protease dapat diketahui dengan melakukan uji aktivitas protease ekstraseluler. Pada penelitian ini telah dilakukan pengukuran aktivitas protease ekstraseluler dan penentuan pengaruh waktu inkubasi serta penambahan toluena terhadap aktivitas protease. Sampel yang digunakan sebagai sumber enzim berupa slurry dan direaksikan dengan substrat kasein 0,3% selama 3,6,9 dan 24 jam dengan dan tanpa penambahan toluena 1% (v/v). Produk reaksi enzimatis diukur dengan metode kolorimetri. Aktivitas protease tertinggi yang diperoleh sebesar 1,9 x 10-4 U/mL dengan penambahan toluena pada waktu inkubasi 6 jam dan sebesar 1,2 x 10-4 U/mL tanpa penambahan toluena pada waktu inkubasi 9 jam. Hasil ini menunjukkan bahwa protease ekstraseluler pada tanah hutan mangrove yang dihasilkan oleh mikroba proteolitik memilki potensi digunakan untuk eksplorasi enzim. Waktu inkubasi dan penambahan toluena tidak berpengaruh signifikan terhadap aktivitas protease. ABSTRACT: The potency of mangrove soil in Suwung Kauh Bali as a source of protease has been determined by protease activity assay. This research has been done to determine protease activity and the effect of incubation time and the addition of toluene to the protease activity. The slurry of soil was used as a source of extracellular enzyme for protease assay, which was reacted with casein 0,3% for 3, 6, 9, and 24 hours with and without the addition of toluene 1% (v/v). The enzymatic reaction product was measured by colorimetric method. The highest protease activity with addition of toluene was 1,9 x 10-4 U/mL at 6 hours incubation and without toluene was 1,2 x 10-4 U/mL at 9 hours incubation. These results showed extracelluler protease on mangrove soil produced by proteolytic microorganisms had a potency to be used in enzyme exploration. Furthermore, the incubation time and addition of toluene had no significant effect to protease activity.

SUHU DAN WAKTU OPTIMUM PROSES EKSTRAKSI ANTOSIANIN DALAM UBI JALAR UNGU (Ipomoea batatas L.) DENGAN ?-L-ARABINOFURANOSIDASE I N. Wirajana; N. M. T. Juliasari; A.A. I.A.M. Laksmiwati; N. W. Bogoriani
Jurnal Kimia (Journal of Chemistry) Vol.13 No.1 Januari 2019
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Enzyme-assisted extraction (EAE) method is one of the most environmentally friendly methods of enzyme application in the extraction of bioactive compounds. The purpose of this study was to determine the optimum temperature and time required in the extraction of anthocyanin compounds from purple sweet potato (Ipomoea batatas L.) with and without ?-L-arabinofuranosidase (AbfA) - assisted. The AbfA enzyme was obtained from Saccharomyces cerevisiae recombinant strain BJ1824 contain pYHMI-Af plasmid. The optimum temperature and time in the extraction of anthocyanin compound with and without ?-L-arabinofuranosidase from purple sweet potato were performed on the 40, 50, 60 and 700C; and 150, 180, 210 minutes. The extraction was done by ethanol solvent of 60,32% (v/v) acidified with citric acid of 2,39% (b/v). The measurement of anthocyanin levels using UV-Vis Spectrophotometer at 527 nm and 700 nm wavelengths at pH 1,0 and 4,5. The optimum condition of non-enzyme-assisted extraction was at 600C for 210 minutes, with the anthocyanin levels of 26,3842 mg/L; while with the AbfA enzyme-assisted at 500C for 180 minutes, with the anthocyanin levels of 28,2056 mg/L. The extraction with enzyme-assisted resulted the anthocyanin levels of 6,90% higher than without the using of enzyme.

PENGGUNAAN KITOSAN DARI LIMBAH KULIT UDANG SEBAGAI INHIBITOR KEASAMAN TUAK Fikriatun Nurhikmawati; Manuntun Manurung; A. A. I. A. Mayun Laksmiwati
Jurnal Kimia (Journal of Chemistry) Vol. 8, No. 2 Juli 2014
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

The research has been conducted to determine the ability of chitosan from shrimp shell as an inhibitor of tuak acidity. Isolation of chitin is done through three stages, namely deproteination, demineralization, and depigmentation. The deacetylation process of chitin into chitosan was accomplished with 50% (w/v) NaOH with a ratio of 1:10 at 90oC for 120 minutes. 15.33 g chitin was gained (15.33%), and 9.94 g chitosan or 9.94% were obtained with a degree of deacetylation of 69.87%. The optimum concentration of kitosan to inhibit tuak pH changes was 2% (w/v) thus providing a longer shelf life with lowest acidity (pH).

PERBANDINGAN AKTIVITAS SPESIFIK EKSTRAK KASAR ENZIM BROMELIN BUAH NANAS YANG DIISOLASI DENGAN BEBERAPA JENIS GARAM PENGENDAP I. A. Preharsini Kusuma; A. A. I. A. M. Laksmiwati; Made Arsa; Ketut Ratnayani
Jurnal Kimia (Journal of Chemistry) Vol. 9, No. 2 Juli 2015
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

The aim of this research was to find specific activity of bromelain enzyme extracted from crude extract of pineapple fruit (Queen variety) by salting out method using three different salts, which were (NH4)2SO4, NaCl, and Kusamba traditional salt. Crude extract of bromelain enzyme was obtained by precipitation method using salt with different levels of saturation. This study included determination of total protein concentration by using Biuret method and protease activity by using Anson method to get the specific activities of the crude extract. The results showed that the highest specific activities of bromelain enzymes precipitated with the three salts (NH4)2SO4, NaCl and Kusamba traditional salt with the ratio of 1: 0.94: 0.56 were 0.2887 U/mg (at 20% saturation) ; 0.2705 U/mg (at 40% saturation) and 0.1623 U/mg (at 80% saturation). Fractination of enzyme with the NaCl and Kusamba traditional salt gave smaller specific activity value than (NH4)2SO4. This results may caused of NaCl had smaller ionic strength, the presence of other ions in Kusamba traditional salt and the different solubility of bromelain enzyme in different salts. However, due to the ratio of NaCl approached (NH4)2SO4 and the availability of Kusamba traditional salt they could be used as alternative salts to replace (NH4)2SO4 in fractination bromelain enzyme from crude extract of pineapple fruit

NILAI DAYA HANTAR LISTRIK, KADAR ABU, NATRIUM, DAN KALIUM PADA MADU BERMERK DI PASARAN DIBANDINGKAN DENGAN MADU ALAMI (LOKAL) Putu Setya Sri Antary; Ketut Ratnayani; A. A. I. A. Mayun Laksmiwati
Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 2 Juli 2013
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Honey sweet substance naturally produced by bees. Good honey must meet the requiremends setby the Indonesian National Standard (SNI). The aim of this research was to determine thequality of some branded honey samples sold in some markets around Denpasar and natural honey (local) collected from beekeepersby examining their electrical conductivities, ash contents, and ratio of potassium to sodium. The electrical conductivities were determinedby applying the standard procedures established by IHC (International Honey Commission), ash contents were quartified by following the procedures of standard SNI01-3545-2004, while the determination of potassium and sodium contents were carried out by the use of Atomic Absorption Spectrophotometry. The results showed that the electrical conductivities and ash contentsin all honey samples studiedmet the maximum limits of standard values which were of 0.8 mS.cm-1 and 0.50 %, respectively. The results also demonstrated that the value of electrical conductivities were proportional to the ash contents. The ratio of sodium to potassium of a good quality honeyis approximately 4 : 1. In this research, it was found that the ratio of Na : K for samples A (natural honey), B, C, and D, were of (3 : 1), (2: 1), (4 : 1), and (4 : 1), respectively, while for sample E was of 8 : 1. It was concluded that A, B, C, and D samples meet the criteria of good quality honey, while sample E (not branded honey) didnot meet the criteria.

Co-Authors - Yunita A. A. Ayu Septri Juwarni Amanda Awalia Ramadhani Devi Esteria Hasianna Purba Diah Suci Emmy Sahara Fikriatun Nurhikmawati Helen Helda Prastika I Gusti Ayu Kunti Sri Panca Dewi I Nengah Wirajana I Nyoman Mika Adi Santosa I P. G. A. Suandi I Wayan Sudiarta I. A. Preharsini Kusuma I. A. R. Astiti Asih Ida Bagus Putu Eristya Putra Inten Hardianti Nizar Iryanti Eka Suprihatin Ita Hidayatus S James Sibarani Ketut Ratnayani M. Nazib Made Arsa Maman Sudiarto Manuntun Manurung N. M. T. Juliasari N. W. Bogoriani Ni G. A. M. Dwi Adhi Suastuti Ni Komang Ariati Ni Luh Eka Lusiana Dewi Ni Made Puspawati Ni P. Indah Septian P. Ni Wayan Agustini Noviana Dewi, Ni Luh Made Putu Setya Sri Antary Putu Suarya W. D. Sulihingtyas Yulius Leo Adeputra

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