Article Per Year (5 Year)
p-Index From 2019 - 2024
1.463
P-Index
This Author published in this journals
All Journal MEDIAN REACTOR : Journal of Research On Chemistry And Engineering JURNAL KIMIA SAINTEK DAN PENDIDIKAN Journal of Industrial Community Empowerment SAINTI: Majalah Ilmiah Teknologi Industri
Pevi Riani
Politeknik ATI Padang
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Economics, Econometrics & Finance Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Other

Published : 9 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 9 Documents
Search

 1 
Penentuan Kadar Kalium Sorbat dan Persen Recovery Pada Selai dengan Metoda High Performance Liquid Chromatography Pevi Riani; Ulvie Ameinda Fannin
REACTOR: Journal of Research on Chemistry and Engineering Vol 1, No 2 (2020): Published in December 2020
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v1i2.7

Abstract

Fruit jam is one of the preserved products that have a soft texture that contains crushed fruit and is mixed with sugar with the addition or without the addition of water. Preservatives are added to prevent damage to jams. A preservative that is usually added to jam is potassium sorbate. Potassium sorbate is commonly used as a preservative because it dissolves more easily when added to food. This study aims to determine the levels of potassium sorbate in jam samples. Potassium sorbate was determined using High Performance Liquid Chromatography (HPLC). From the test results, it was found that potassium sorbate levels ranged from719, 65 mg/kg to 757,24 mg/kg. The results of this test will be compared with the standards set by the Food and Drug Supervisory Agency (BPOM) No. 36 of 2013 concerning the maximum limit for the use of preservative food additives, namely 500 mg/kg. From the test results, it can be seen that the potassium sorbate in all samples exceeds the quality standard set by the BPOM. Therefore, people must be more careful in choosing jam to consume daily. The test results have used the right method, namely by adjusting the stationary phase, mobile phase and the right wavelength so that the% recovery results are 103%.
PRODUCTION OF CELLULOSE ACETATE MEMBRANE FROM COCOA (THEOBROMA CACAO L) SHELL MODIFIED POLYETHYLENE GLICOL FOR PB METAL ION FILTRATION Pevi Riani; Syafrinal; Muhammad Ikhlas Armin
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 6 No. 2 (2022): Jurnal Kimia Saintek dan Pendidikan
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51544/kimia.v6i2.3521

Abstract

In this study, a modified polyethylene glycol modified cellulose acetate membrane was made. Cellulose acetate was synthesized from cocoa husk waste (Theobroma cacao L) with several steps, namely isolation of alpha cellulose from cocoa husk waste, synthesis of cellulose acetate from alpha cellulose, preparation of 10% cellulose acetate membrane with the addition of polyethylene glycol 0, 5, 10, 15, 20 & 25% . From the results of the research, it was found that the FT-IR analysis of -cellulose from cocoa shells showed an absorption peak at wave numbers between 3400 – 3500 cm-1 which indicated the presence of O-H stretch groups. At wave numbers 2800-2900 cm-1 indicates C-H stretching, then it can be seen at wave numbers 1160 cm-1 indicates C-O-C stretching, and at 1035-1060 cm-1 indicates C-O stretching. In the fingerprint area, we found absorption peaks at wave numbers around 1300 cm-1 which indicated the presence of C-H bending and around 1400 cm-1 indicating the presence of CH2 bending. The cellulose acetate obtained is white and smooth compared to alpha cellulose. At the membrane preparation stage, the results of the insoluble cellulose acetate & PEG using acetone as a solvent. So it is necessary to do a solubility test and find a suitable solvent to form polyethylene glycol modified cellulose acetate membrane for Pb metal ion filtration.
Teknologi Tepat Guna Produksi Sabun Batang Dari Minyak Jelantah di Padang Pariaman Pevi Riani; Melysa Putri; Renny Futeri; M. Ikhlas Armin; Selfa Dewati Samah; Syafrinal Syafrinal; Hafnimardiyanti Hafnimardiyanti
Journal of Industrial Community Empowerment Vol 1, No 2 (2022): Published in October 2022
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (539.507 KB)

Abstract

Ramuak cracker is one of the main product of Toboh Mandailing, Balai Baru, VII Koto Sungai Sariak, Padang Pariaman, West Sumatera. One of the obstacles faced by the cracker industry players is the amount of used cooking oil produced. Used cooking oil is leftover frying oil that has been repeatedly used. If it continues to be consumed, it will be harmful to health. If discharged into the environment, it will cause environmental pollution. Therefore, the Community Partnership Program Team of the Politeknik ATI Padang provided counseling about the dangers of used cooking oil and efforts to process used cooking oil into something useful, namely producing bar soap with used cooking oil as its raw material. The step of making bar soap from used cooking oil is to slowly dissolve the NaOH solution into 500 grams of used cooking oil, then stir using a stainless steel stirrer until evenly distributed and there are no more lumps. The next step is to add dyes and fragrances and stir again to form a soap mixture. Do the printing of the soap dough in the mold by coating it with parchment paper. Let stand for 24-48 hours until the saponification process is complete. PKM activities carried out well and smoothly and in accordance with the expected results. Each participant was able to make bar soap from used cooking oil very well. This activity is expected to provide insight, knowledge and input to partners regarding the process of making bar soap from used cooking oil so that it can be used for daily needs and can even be sold as an additional source of income for the community.
Pelatihan Pembuatan Temulawak Serbuk Instan di Daerah Lubuk Minturun Kecamatan Koto Tangah Kota Padang Renny Futeri; Syafrinal Syafrinal; Pevi Riani; Muhammad Ikhlas Armin; Selfa Dewati Samah; Melysa Putri; Hazil Anwar
Journal of Industrial Community Empowerment Vol 1, No 1 (2022): Published in April 2022
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (494.89 KB)

Abstract

Curcuma can be used to maintain and improve body health as well as treat disease. Instant powdered curcuma drink is one of the curcuma plant's processed products.People in the Lubuk Minturun Koto Tangah District, Padang City have natural and human resources that can be utilized through training programs for creating instant powdered curcuma. This exercise drew a total of 25 women, including housewives and teenagers. There are three steps to this community service activity: lectures, demonstrations, and practice. Because the production method is simple and the tools and materials required are readily available, more than 90% of the participants in this activity were able to comprehend the process of making instant powdered curcuma. It is intended that by participating in this activity, the community would be able to increase entrepreneurial prospects and so boost the economy.
PENENTUAN RASIO MOL REAKTAN OPTIMAL PADA PEMBUATAN SURFAKTAN DIETANOLAMIDA DENGAN KATALIS NATRIUM HIDROKSIDA (NaOH) Pevi Riani
JURNAL ILMIAH TEKNOLOGI INDSUTRI (SAINTI) Vol 15, No 2 (2018): VOL 15 NO 2 DESEMBER 2018
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (256.547 KB)

Abstract

Surfactant is a molecule which also has a hydrophilic group and a lipophilic group so that it can unite a mixture consisting of water and oil. Diethanolamide is a nonionic surfactant that is widely used in the manufacture of various cleaning, care and cosmetics products. This surfactant is renewable and easily degraded so it does not pollute the environment. In this study, we will observe the effect of the mole ratio the reactants on the synthesis of dietanolamide surfactants from dietanolamine and methyl ester of fatty acids of palm distillate (ALSD) with sodium hydroxide (NaOH) catalyst. This study aims to determine the value of Hydrophylic Lipophylic Balance (HLB), saponification number, acid number, ester number of surfactant by observing the influence of mole ratio of reactants. This research was conducted using hot plate Carousel at a temperature of 80°C, reaction time of 4 hours, the ratio of moles of reactants, among others (1: 1, 1: 2, 2: 1, 2: 2, 3: 1, 3: 2), stirring speed 300 rpm and catalyst concentration 1% (b/b). In the oxidation reaction the sample is taken after hours then the results are washed with n-hexane then purified by heating the surfactant product at a temperature of 90°C to vaporize the hexane solvent. The results containing surfactants were analyzed by Hydrophylic Lipophylic Balance Method and FT-IR Spectrophotometer. Based on this study, optimal conditions were obtained at 80°C, 4 hours reaction time and 3: 2 mole ratio reactants. From the results of analysis of dietanolamide surfactant obtained HLB value is 5.81 which is in the range of HLB emulsifier water in oil according to the standard.
PENENTUAN NILAI COLOUR GULA PRODUK PADA UNIT LUMP SEPARATOR DENGAN MENGGUNAKAN SPEKTROFOTOMETER VISIBLE DAN REFRAKTOMETER Pevi Riani; Diana Triyanti Gultom
JURNAL ILMIAH TEKNOLOGI INDSUTRI (SAINTI) Vol 16, No 2 (2019): VOL 16 NO 2 DESEMBER 2019
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (417.319 KB)

Abstract

Refined sugar is produced from raw sugar through refined processes for the needs of the food and beverage industry.The raw materials used are imported from the raw sugar producing countries of Australia, Brazil and Thailand. Quality control is caried out since the arrival of the material so that the material received is only material that meets the quality requirements.The most important process control in the process of refined sugar processing is during the decolorization process.In determining the color value the method used is visible spectrophotometry to determine the absorbance value and refractometryto determine the value of %brix. Based on the results of the determination made at PT Medan Sugar Industry obtained the average value of the color of sugar R1 products is 11.1 IU, the color value of sugar product R2 is 23.5 IU, the color value of sugar product R3is 33.2 IU, and the color value of sugar product R4 is 39.6 IU, when compared with the quality standards used, the value of the color of the sugar product meets the standars. The quality standard used is ICUMSA (International Commision for Uniform Methods of Sugar Analysis) with IU units (ICUMSA Unit) and testing of refined sugar products based on SNI.01.3140.2-2011.A.6 regarding the quality requirements of refined crystal sugar where grade A namely ≤45 IU and grade B which is 45-80 IU.
PENENTUAN DISOLUSI PADA OBAT SENYAWA KETOPROFEN SECARA SPEKTROFOTOMETRI Renny Futeri; Pevi Riani
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 7 No. 1 (2023): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51544/kimia.v7i1.3868

Abstract

Research on dissolution determination of Ketoprofen compounds by Spectrophotometry. Ketoprofen is a non-steroidal anti-inflammatory drug compound (NSAID) that works as an anti-inflammatory. Anti-inflammatory here is a group of drugs used to reduce inflammation and relieve pain. The dissolution test is a method used to determine the content of active compounds that dissolve in drugs, where the time, temperature and media are set according to the human stomach and intestines, and can find out how much the content of active compounds dissolves in the human intestines and stomach. This dissolution test, then the ketoprofen drug is read by spectrophotometry. Test the dissolution by spectrophotometer at a wavelength of 260 nm using HCl 0.1 N and buffer pH 7.4. The results of the determination of the dissolution test of the active substance on ketoprofen at the acid stage obtained an average of 0.009% and at the pH 7.4 buffer stage obtained an average content of 86.4155%. It can be concluded that the determination of the ketoprofen dissolution test in the sample meets the requirements (MS), in accordance with the specifications of the Internal Standard of PT Novell Pharmaceutical Laboratories, namely at the acid stage not more than 10% of ketoprofen dissolved in 2 hours, and at the pH 7.4 buffer stage it has a requirement of 75%. ketoprofen dissolved in 45 minutes. In the dissolution of acidic media, 0.1 N HCl is used because its condition resembles that of the stomach.
PENENTUAN JENIS MEDIA TERHADAP EFEKTIVITAS PERTUMBUHAN JAMUR TRICHODERMA HARZIANUM Pevi Riani; Renny Futeri
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 7 No. 1 (2023): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51544/kimia.v7i1.3909

Abstract

This study aims to determine a suitable medium for the growth Trichoderma harzianum. The treatments tested were rice media (M1), bran media (M2), corn media (M3), potato media (M4), and rice husk mixed media (M5). The parameters observed in this study were the quality test of conidia density using a microscope and haemacytometer, macroscopic observation of the media for 7 days and microscopic observation of the media to evaluate the media that had the best effectiveness as a medium for propagation of Trichoderma harzianum. The initial isolate of Trichoderma harzianum used had a conidia density of 2,9x109conidia/ml. The results showed that the propagation of Trichoderma harzianum in various media affected the macroscopic, microscopic and conidia density changes of Trichoderma harzianum. Trichoderma harzianum can grow on all treatment media. The bran media is the medium with the highest conidia density compared to other media.
Studi Perbedaan Kualitas Produksi Minyak Goreng Kemasan A Dan B Serta Curah Syafrinal Syafrinal; Pevi Riani; Selfa Dewati Samah
Median : Jurnal Ilmu Ilmu Eksakta Vol. 15 No. 2 (2023): Jurnal Median
Publisher : Universitas Muhammadiyah Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33506/md.v15i2.2383

Abstract

Differences in the quality of bulk and packaged cooking oil are caused by differences in the quality of raw materials and production processes. This study aims to compare the quality of packaged cooking oil A and B also bulk which have been produced before being marketed. This research is a quantitative approach that focuses on the analysis of Free Fatty Acid, Moisture & Impurities, Iodine Value, Peroxide Value, color, stability, cloud point and pelican oil on packaged cooking oil A and B also bulk. The results showed that the test parameter values ​​for packaged cooking oil A and B also bulk were 0.064 %, 0.065 % and 0.068 % for FFA. M & I content were 0.040 %, 0.045 % and 0.046 %. 60,887; 59,034; and 57,416 g I2/100 mg oil were the IV values. The PV values were 0.098; 0.102; and 1,58 Mek O2/Kg. 1.9/46 Red/Yellow, 2.1/51 Red/Yellow, and 2.3/51 Red/Yellow are the color values. For stability, timers for 10 minutes, 5 minutes, and 1 minute. Cloud point temperatures were 4.4°C, 7.4°C, and 9.8°C and negative results on the pelican oil test. The obtained packaged cooking oil A is of higher quality than packaged cooking oil B and bulk.
Co-Authors Diana Triyanti Gultom Hafnimardiyanti Hafnimardiyanti Hazil Anwar M. Ikhlas Armin Melysa Putri Muhammad Ikhlas Armin Renny Futeri Selfa Dewati Samah Syafrinal Ulvie Ameinda Fannin