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All Journal KOVALEN: Jurnal Riset Kimia Al-Kimia KAIBON ABHINAYA : JURNAL PENGABDIAN MASYARAKAT

Dwi Juli Puspitasari

Chemistry Dept.of Mathematics And Natural Science Faculty, Tadulako University, Palu.

Author-ID : 672174

Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance

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Formalin Analysis of Food Ingredients in Palu Rismawaty Sikanna; Ivone Venita Sarapun; Dwi Juli Puspitasari
Al-Kimia Vol 6 No 1 (2018): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v6i1.4916

Research on formalin analysis of food ingredients in Palu has been conducted. The purpose of the research is to find out formalin content in some food. The analyzed samples were foods that marketed in Palu, such as salt fish, noodles, mujair fish, and tofu obtained from several places in Palu. The qualitative analysis of formalin done before measured of formalin quantitatively. The data on formalin found by UV-Vis spectrophotometer with the wavelength of 385 nm. Formalin content of salted fish, noodles, Mujair fish, and tofu were 2,005 ± 0,187ppm, 2,183 ±0,231ppm, 1,931 ±0,174 ppm, and 1,957 ±0,254 ppm, respectively.

PENGGUNAAN SELULOSA-DIETILENTRIAMINA SEBAGAI LAPISAN PENGIKAT LOGAM Cu(II) DENGAN METODE GRADIEN DIFUSI DALAM FILM TIPIS Khairuddin Khairuddin; Dwi Juli Puspitasari
KOVALEN: Jurnal Riset Kimia Vol. 2 No. 3 (2016)
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (554.586 KB)

This researh aims to application of cellulose-diethylenetriamine as a binding layer on the diffusive gradients in thin films method with modification of cellulose with diethylenetriamine. The method of diffusive gradients in thin films in principle uses a simple instrument such as round plastic with a diameter of 2.5 cm, which is filled with metal binding gel, diffusive gel, and membrane filter of 0.45 µm. The metal ions were diffuse through the membrane filter and diffusive gel according to the Fick's Law I, and then is accumulated in the binding layer gel. Based on the results of FTIR analysis, the formation of the binders of the copper ions at the binding layer of cellulose-dietilentriamina involves amine and hydroxyl functional groups.The results of the application of cellulose- diethylenetriamine using as binding layer with polyacrylamide diffusive gel showed a liniar concentration up to 12 hours of contact time and initial copper ion concentration up to 1000 mg/L. The maximum concentration of copper was obtained at pH 4.Keywords: copper, cellulose- diethylenetriamine, polyacrylamide gel.

KAJIAN BIOREMEDIASI PADA TANAH TERCEMAR PESTISIDA Dwi Juli Puspitasari; Kahiruddin Khairuddin
KOVALEN: Jurnal Riset Kimia Vol. 2 No. 3 (2016)
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (256.726 KB)

The use of pesticides to eradicate pests are an integral part in farming system. Pesticides use to increase production and protect the production of physical defects can also cause pollution on agricultural land. The presence of pesticide residues in soil and agricultural production can cause health problems for human and animals and even death. To overcome this problem there needs a way to degrade hazardous waste in the environment by performing the remediation. Remediation is carried out by microorganisms fungi, bacteria and algae known as bioremediation. Bioremediation aims to transform compounds into harmless compounds with the end result are carbon dioxide, water and biomass cells. The advantages of bioremediation are environmentally friendly, highly efficient, low cost, can be implemented directly in the field, laboratory and combined with chemical and physical methods.Keywords: bioremediation, soil degradation, pesticides, microorganisms

STUDI PERBANDINGAN ANALISIS VITAMIN E MINYAK SAWIT MERAH TERSAPONIFIKASI ANTARA METODE SPEKTROFOTOMETRI UV-VIS DAN KCKT Arlina Mayharty Andulaai; Ruslan Ruslan; Hardi Ys.; Dwi Juli Puspitasari
KOVALEN: Jurnal Riset Kimia Vol. 3 No. 1 (2017): Edisi April
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (751.941 KB)

A research about a comparative study of spectrophotometry UV-Vis and HPLC method for the analysis of vitamin E in saponified red palm oil has been done. This research aims to compare the results of analysis using Spectrophotometer UV - Vis and HPLC to determine the concentration of vitamin E in red palm oil previously saponified and extracted. HPLC analysis was carried out using an RP-18 column and mobile phase composed a methanol and water ( 86:14 ), with a flow rate of 1 ml/min and UV detection at 290 nm. For the Spectrophotometric UV-Vis analysis, hexane was used as a solvent and the wavelength at 298,5 nm was selected for the detection. The results are the concentration of vitamin E using spectrophotometric and HPLC method was respectively 104.5 ppm and 127 ppm.Keyword: Vitamin E, Red Palm Oil, saponification, extraction, spectrophotometry Ultra Violet -Visible, High Performance Liquid Chromatography

KAJIAN EKSTRAK ETANOL MAHKOTA BUNGA KETEPENG CINA (Cassia alata L) SEBAGAI BIOINDIKATOR ASAM BASA Khairunnisa Khairunnisa; Khairuddin Khairuddin; Dwi Juli Puspitasari
KOVALEN: Jurnal Riset Kimia Vol. 3 No. 3 (2017): Edisi Desember
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (301.761 KB)

The acid-base bioindicator is an alternative substitute for the synthetic indicator. The study about ethanol extract of Ketepeng Cina crown flowers as an acid-base bioindicator source has been done. The research about utilization of ethanol extract of Ketepeng Cina crown flower was aimed to study compound group, pH range and acid-base titration which is suitable as bioindicator. This research was performed with gradual extraction by maceration method with three solvents. The results showed that ethanol extract from Ketepeng Cina crown flowers contained flavonoid, polyphenol, alkaloid, and tannin. Extract of Ketepeng Cina crown flower was yellow in acid and orange in the base with the pH range of 7-9.Keywords: Ketepeng Cina, Bioindicator, Acid-Base, Titration.

KANDUNGAN KAROTEN KERUPUK SIMULASI WORTEL (Daucus carota L.) VARIASI SUHU PENYIMPANAN Ulfa Mustika Sari; Syaiful Bahri; Dwi Juli Puspitasari
KOVALEN: Jurnal Riset Kimia Vol. 4 No. 1 (2018): Edisi April
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Telah dilakukan penelitian mengenai kandungan karoten kerupuk simulasi wortel variasi waktu penyimpanan.Tujuannya adalah untuk mengetahui umur simpan kerupuk produk hasil olahan wortel pada penyimpanan suhu ruang berdasarkan kandungan karoten dari kerupuk tersebut. Penelitian meliputi tahap produksi kerupuk dan waktu penyimpanan kerupuk pada suhu ruang. Tahap produksi kerupuk dilakukan dengan metode simulasi. Kerupuk wortel disimpan pada suhu ruang selama 63 hari dengan selang waktu pengamatan retensi karoten setiap 7 hari. Hasil penelitian menunjukkan kandungan karoten awal 75,80mg/100g dan kandungan karoten kerupuk minggu pertama hingga minggu 9 (atau 63 hari) secara berturut-turut 71mg/100g, 68,5mg/100g, 62mg/100g, 59,5mg/100g, 55mg/100g, 52,5mg/100g, 49mg/100g, 45mg/100g, 43,5mg/100g dan 40mg/100g. Masa simpan kerupuk berdasarkan reaksi orde satu adalah 133 hari dengan kandungan karoten 21,3mg/100g.Kata kunci: wortel, karoten, kerupuk simulasi wortel, masa simpan

EFISIENSI MIKROKAPSUL EKSTRAK ETANOL KELOPAK BUNGA ROSELLA (Hibiscus sabdariffa Linn) TERSALUT KARAGINAN KASAR (Eucheuma cottoni) Ni Ketut Sumarni; Yana Silvia Mauru; Dwi Juli Puspitasari; Diharnaini Diharnaini
KOVALEN: Jurnal Riset Kimia Vol. 4 No. 2 (2018): Edisi Agustus
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Penelitian tentang efisiensi mikrokapsul ekstrak etanol kelopak bunga rosella (Hibiscus sabdariffa Linn) tersalut karaginan kasar (Eucheuma cotonii ) telah dilakukan. Penelitian ini bertujuan menentukan efisiensi tertinggi dari mikroenkapsulasi berdasarkan rasio ekstrak etanol kelopak bunga terhadap karaginan kasar sebagai penyalut. Mikroenkapsulasi dilakukan dengan menggunakan teknik pembekuan kering. Enkapsulasi ini diharapkan dapat mempertahankan senyawa aktif ekstrak etanol. Rasio dari ekstrak etanol terhadap karaginan kasar dilakukan pada 1:3; 1:4; 1:5; 1:6 dan 1:7; (b/b). Hasil penelitian diperoleh bahwa rasio 1:7 menghasilkan efisiensi tertinggi, yaitu 86,01%.Kata kunci: Ekstrak etanol , karaginan kasar, efisiensi

PENGARUH PENAMBAHAN EKSTRAK ETANOL SABUT KELAPA MUDA (Cocos nucifera Linn) DALAM SARI JAGUNG MANIS (Zea mays var. saccharata) TERHADAP BAKTERI Staphylococus aureus DAN Shigella dysenteriae Askhiatul Fitriah; Khairuddin Khairuddin; Dwi Juli Puspitasari
KOVALEN: Jurnal Riset Kimia Vol. 4 No. 3 (2018): Edisi Desember
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Telah dilakukan penelitian tentang pengaruh penambahan ekstrak etanol sabut kelapa muda (cocos nucifera Linn) dalam sari jagung manis (Zea mays var. saccharata) terhadap Staphylococcus aureus (gram positif) dan Shigella dysenteriae (gram negatif). Tujuan penelitian yaitu untuk mengetahui pengaruh penambahan konsentrasi ekstrak etanol sabut kelapa muda terhadap pertumbuhan koloni bakteri pada sari jagung manis, serta total pertumbuhan koloni bakteri terendah pada ekstrak etanol sabut kelapa muda dalam sari jagung manis. Metode maserasi digunakan dalam proses ekstraksi sabut kelapa muda dengan pelarut etanol, selanjutnya ekstrak sabut kelapa muda dicampurkan dengan sari jagung manis sesuai variasi konsentrasi 1%, 2%, 3%, 4% dan 5%. Analisis total pertumbuhan bakteri ekstrak etanol sabut kelapa muda dalam sari jagung manis dilakukan dengan metode TPC. Hasil penelitian menunjukkan bahwa total pertumbuhan koloni bakteri terendah yaitu pada konsentrasi 5% untuk bakteri Shigella dysenteriae sebesar 1,0x107 CFU/mL dan Staphylococus aureus sebesar 1,6x107CFU/mL.Kata kunci: Zea mays var. saccharata, Cocos nucifera Linn, antibakteri, total koloni

EKSTRAKSI DAN KARAKTERISASI MINYAK BIJI SALAK (Salacca edulis Reinw) DARI SALAK LOKAL DAN SALAK PONDOH Irawati Saleh; Indriani Indriani; Dwi Juli Puspitasari
KOVALEN: Jurnal Riset Kimia Vol. 4 No. 2 (2018): Edisi Agustus
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Telah dilakukan penelitian mengenai ekstraksi dan karakteristik minyak biji salak (Salacca Edulis Reinw) dari salak lokal dan salak pondoh. Penelitian ini bertujuan melihat profil asam lemak dan menentukan karakteristik kimia minyak biji salak. Ekstraksi dilakukan menggunakan metode sokhletasi dengan pelarut n-Heksan. Kadar minyak yang diperoleh adalah salak lokal sebesar 0,52% dengan berat minyak 0,13 g dan salak pondoh kadar sebesar 0,82% dengan berat minyak 0,21 g. Hasil pengukuran GC – MS minyak biji salak lokal dan salak pondoh menunjukkan hasil yang sama. Kromatogram GC – MS dua jenis salak menunjukkan hanya tiga puncak yang teridentifikasi profil asam lemak yaitu metil 14-metil-pentadekanoat, metil cis-9,cis-12-oktadekanoat (Linoleat), dan metil oktadekanoat (Stearat). Hasil karakterisasi minyak salak diperoleh bilangan asam 46.00 mg KOH/g minyak, bilangan peroksida 40 meq O2/g minyak, materi tidak tersabunkan 55,27% untuk salak lokal dan bilangan asam 56,10 mg KOH/g minyak, bilangan peroksida 60 meq O2/g minyak, materi tidak tersabunkan 61,86% untuk salak pondoh.Kata kunci: Salacca edulis Reinw, minyak biji salak, profil asam lemak, sifat kimia

PEMANFAATAN KARBON AKTIF AMPAS TAHU TERAKTIVASI NaCl SEBAGAI PENYERAP ZAT WARNA CONGO RED Sutomo Eka Putra; Khairuddin Khairuddin; Dwi Juli Puspitasari; Husain Sosidi
KOVALEN: Jurnal Riset Kimia Vol. 5 No. 1 (2019): Edisi April
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Telah dilakukan penelitian mengenai pemanfaatan karbon aktif ampas tahu teraktivasi NaCl sebagai penyerap zat warna Congo Red. Penelitian ini bertujuan untuk mengetahui kemampuan karbon aktif ampas tahu teraktivasi NaCl dalam menyerap zat warna Congo Red . Penelitian ini menggunakan rancangan acak lengkap dengan tiga variabel bebas yaitu konsentrasi aktivator, waktu kontak dan pH sedangkan variabel terikat yaitu persentase Congo Red yang terjerap. Hasil penelitian menunjukkan penyerapan terbaik diperoleh pada karbon aktif ampas tahu teraktivasi NaCl 3M dengan waktu kontak optimum selama 60 menit pada kondisi pH 2. Dari penelitian ini diketahui bahwa limbah ampas tahu dapat dimanfaatkan menjadi karbon aktif.Kata kunci: Karbon Aktif, Ampas Tahu, Zat Warna Congo Red, Adsorpsi

Co-Authors Arlina Mayharty Andulaai Askhiatul Fitriah Diharnaini Diharnaini Hardi Ys. Husain Sosidi Indriani Indriani Irawati Saleh Ivone Venita Sarapun Kahiruddin Khairuddin Khairuddin Khairuddin Khairuddin Khairuddin Khairunnisa Khairunnisa Ni Ketut Sumarni Prismawiryanti Prismawiryanti Ruslan Ruslan Sutomo Eka Putra Syaiful Bahri Ulfa Mustika Sari Yana Silvia Mauru

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