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All Journal Jurnal Natur Indonesia Jurnal Pilar Sains Jurnal Sains dan Teknologi Farmasi Jurnal Riset Kimia Majalah Obat Tradisional Jurnal Litbang Industri INDONESIAN JOURNAL OF PHARMACY Indonesian Journal of Chemistry Jurnal Ecolab JFIOnline Jurnal Ilmu Kefarmasian Indonesia Jurnal Litbang Industri
Hamzar Suyani
Universitas Andalas
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Environmental Science Health Professions Industrial & Manufacturing Engineering Mathematics Medicine & Pharmacology Physics Public Health

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KARAKTERISASI EKSTRAK DAUN DEWA (Gynura pseudochina (L.) DC) DENGAN KROMATOGRAFI CAIR KINERJA TINGGI Rivai, Harrizul; Nurdin, Hazli; Suyani, Hamzar; Bakhtiar, Amri
Jurnal Farmasi Indonesia Vol 5, No 3 (2011)
Publisher : Jurnal Farmasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35617/jfi.v5i3.48

Abstract

Extract of god leaves [Gynura pseudochina (L.) DC] has been characterized by using the high performance liquid chromatography method (HPLC). Dried god leaves were extracted by 70% ethanol and followed by fractionation successively with hexane, ethyl acetate, butanol and water. Fractions of ethyl acetate, butanol and water were dissolved in methanol respectively and injected into HPLC system which is optimized previously. Profiles of respective fractions showed a number of specific peaks that can be used to identify and control the quality of god leaves extract.   ABSTRAK Karakterisasi ekstrak daun dewa [Gynura pseudochina (L.) DC] telah dilakukan dengan menggunakan metode kromatografi cair kinerja tinggi (KCKT). Daun dewa kering diekstraksi dengan etanol 70% dan kemudian difraksinasi berturut-turut dengan heksana, etil asetat, butanol dan air. Fraksi-fraksi etil asetat, butanol dan air dilarutkan dalam metanol dan diinjeksikan ke sistem KCKT yang telah dioptimasi sebelumnya. Pola KCKT masing-masing fraksi menunjukkan puncak-puncak khas yang dapat dipakai untuk identifikasi dan pengendalian mutu ekstrak daun dewa.
Penggunaan Zeolit sebagai Pendegradasi Senyawa Permetrin dengan Metoda Fotolisis Zilfa, Zilfa; Suyani, Hamzar; Safni, Safni; Jamarun, Novesar
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (132.086 KB) | DOI: 10.31258/jnat.14.1.14-18

Abstract

The research about the degradation of permethryn compound has been done by photolysis method using natural zeolyte as catalyst.Permethryn is one syntetic pyretroid pesticides that low toxicity for mammals but it is high toxicity for fishs, insects and water microorganisms.Zeolyte is aluminosilicate minerals that can be used for degradation of permethryn. Percentage degradation of permethryn is lower withoutzeolyte than using zeolyte as catalyst by photolysis method. 20 mg/l permethryn solution could be degraded 5.40% after 120 minutesirradiation, while by adding 0.20 g natural zeolyte, permethryn could be degraded 69.70
Validasi Metode MPM untuk Penentuan Kandungan Antioksidan dalam Sampel Herbal serta Perbandingannya dengan Metode PM, FRAP dan DPPH Yefrida, Yefrida; Suyani, Hamzar; Aziz, Hermansyah; Efdi, Mai
Jurnal Riset Kimia Vol 11, No 1 (2020): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v11i1.342

Abstract

The Modified Phenanthroline Method (MPM) has been validated for determination of antioxidant content in herb samples. Validation was done using Relative Standard Deviation (RSD) and percentage of recovery. The RSD and percentage of recovery for herb samples are 3.13% and 98.6%, respectively. Based on these values, MPM method is valid for determining antioxidant content in herb samples. T test shows no significant differences of antioxidant content using any of these methods, MPM, PM, FRAP or DPPH, at a 95% confidence level. MPM method shows a very strong correlation with PM and FRAP method.  While with DPPH and TPC shows is strong.
Influence of drying methods to quality of meniran herb (Phyllanthus niruri LINN.) Rivai, Harrizul; Nurdin, Hazli; Suyani, Hamzar; Bakhtiar, Amri
Indonesian Journal of Pharmacy Vol 22 No 1, 2011
Publisher : Faculty of Pharmacy Universitas Gadjah Mada, Yogyakarta, Skip Utara, 55281, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (166.019 KB) | DOI: 10.14499/indonesianjpharm0iss0pp73-76

Abstract

Effects of drying methods in obtaining the extractive, phenolic content and antioxidant activity in Phyllanthus niruri Linn. herbs have been investigated. The drying  methods  tested  were  air-drying  at  ambient  temperature,  oven-drying  at 40  °C,   oven-drying  at  60  °C,  and  fresh  samples  as  control.  Results  revealed that  drying  of  the  fresh  plant  caused  the  decrease  of  extractive  obtainability, phenolic  content  and  antioxidant  activity.  There  were  significant  differences among drying  methods (p < 0.05). Among the drying methods tested, the best result was by oven-drying at 40 °CKey words: Antioxidant, Phyllanthus niruri Linn., drying methods, phenolic compounds
DEGRADASI SENYAWA 2,4 (DIKLOROFENOKSI) ASAM ASETAT DALAM PESTISIDA SIDAMIN 865 AS SECARA FOTOLISIS DENGAN PENAMBAHAN TiO2-ANATASE Abinul Hakim; Safni -; Hamzar Suyani; Tadao Sakai
Jurnal Riset Kimia Vol. 3 No. 1 (2009): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v3i1.20

Abstract

ABSTRACT Degradation of 2,4-Dichlorophenoxyacetic Acid (2,4-D) in Sidamin 865 AS pesticides had been carried out by photolysis with adding anatase-TiO2. Photolysis method were performed using an irradiation of UV-light at λ 365 nm, 10 W. The degradation of 20 mg/L 2,4-D without addition of anatase-TiO2 was 6.88% within 90 minutes treatment. Degradation of 20 mg/L 2,4-D by photolysis with addition of 0.1000 g anatase-TiO2, degradation was 31.55% within 90 minutes irradiation without stirring and it was 95.42% within 90 minutes irradiation with stirring. Keywords : photolysis, 2,4-dichlorophenoxyacetic acid, anatase-TiO2 
STUDI OPTIMASI PENENTUAN KADMIUM(II) SECARA VOLTAMMETRI STRIPPING ADSORPTIF Deswati Deswati; Hamzar Suyani; Citra Buhatika
Jurnal Riset Kimia Vol. 3 No. 2 (2010): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v3i2.37

Abstract

  ABSTRACT Study of optimation cadmium(II) by adsorptive stripping voltammetry has been done. The aim of this study to get optimum conditions for determination of Cd(II). Parameters were done : potential accumulation, time accumulation, pH, supporting electrolite concentration and optimum of complex concentration. In this case, the optimum conditions were reached in potential accumulation -0.7 V, time accumulation 60 second, pH 7.0, NH4Cl 0.12 M, calcon concentration 0.12 mM. In the optimum condition was obtained with the relative standard deviation was 4.61% for eight replicates, measurements of 0.01 ppm. The method was applied to the direct determination of Cd(II) in water around Batang Air Dingin Lubuk Minturun and Muara Padang. Concentration Cd(II) in sample was equal to 7.359 μg/L and 3.659 μg/L with recovery of 99.04%. Keywords: cadmiun, adsorptive, stripping, voltammetry
DEGRADASI SENYAWA PARAQUAT DALAM PESTISIDA GRAMOXONE® SECARA SONOZOLISIS DENGAN PENAMBAHAN TiO2-ANATASE Neila Yenni; Safni Safni; Hamzar Suyani
Jurnal Riset Kimia Vol. 3 No. 2 (2010): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v3i2.58

Abstract

 ABSTRACT Degradation of Paraquat compound in Gramoxone pesticide had been done by sonolysis, ozonolysis, and sonozolysis. Sonolysis methods were performed using an ultrasound VC-1, ozonolysis using a bio-ozone space age sterilizer, and sonozolysis by combining sonolysis and ozonolysis methods. The optimum condition for degradation of 4 mg/L paraquat by sonolysis was found at temperature 40±1°C. Percentage of degradation at optimum condition was 22.80% with 90 minutes treatment. Whereas, with using ozonolysis method percentage of degradation of paraquat 4 mg/L was 50.39% with 60 minutes treatment. The combination of sonolysis and ozonolysis method simultaneously, these so-called sonozolysis, for degradation of the same compound, extend the percentage of degradation to 45.87% with only 30 minutes treatment. Keywords: Paraquat, Sonolisis, Ozonolisis
PENGGUNAAN KATALIS ZnO-H2O2 UNTUK DEGRADASI ZAT WARNA RHODAMIN B DAN ALIZARIN-S Safni -; Fitrah Amelia; Oktanora Liansari; Hamzar Suyani; Yulizar Yusuf
Jurnal Riset Kimia Vol. 3 No. 1 (2009): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v3i1.87

Abstract

 ABSTRACT The textile industry produce colored waste liquid that can contaminate the line water and its populations. A number of dyes are using in textile industry processes such as rhodamine-B and alizarine-S. Both of dyes are toxic for human life. In order to reduce the concentration that dyes is used the sonolysis method which have good efficiency and effective to degrade this pollutants. Sonolysis was performed using an ultrasound energy at 47 kHz. Catalyst ZnO is used to get better degradation. Rhodamine-B 2mg/L with 0.3 g ZnO addition, pH 5, temperature 40°C get 35.44% degradation after 60 minutes. If we used 3 mL H2O2 30% in the same condition the degradation up to 42.67% and with the combination of 0.3 g ZnO - 3 mL H2O2 as catalysts it got 91.99% after 90 minutes. Alizarine-S 20 mg/L with 0.5 g ZnO addition, pH 5, temperature 50°C was degraded up to 86.45% after 35 minutes. Furthermore, the degradation reached 95.79% if it used 0.5 g ZnO and 25 mL H2O2 30% at pH 5 and temperature 50°C after 35 minutes sonolysis. Keywords : rhodamine-B, alizarine-s, ZnO, H2O2
Penentuan Vanadium Secara Spektrofotometri Fosfowolfrovanadat Dalam Batuan Bukit Pianggu Kabupaten Solok Roswita -; Hamzar Suyani; Safni -
Jurnal Riset Kimia Vol. 2 No. 1 (2008): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v2i1.96

Abstract

 ABSTRACT A simple, rapid and accurate Spectrophotometric method described to the determination of vanadium in ore using sodium tungstat as a complexing agent. The method is based on the oxidation of sodium tungstat to form a yellow colored on reaction with vanadium (V), having maximum an absorption occurred at 403 nm. The relative standar deviation of the method for 8 mg/L vanadium (n=11) was 0.24%, and the molar absorptivity is 2.026103 L mol-1cm-1 and sensitivity Sandell is 2.5  10-2 mg cm.2 . The recovery test is 99.47%.  The effect of ion interfering Fe  (element large amount in ore) on determination is describe. The general procedure which was developed is suittable for determination of 0-20 mg/L of Vanadium and should be applicable to variety of ore sample. Keywords : vanadium, spectrophotometric, sodium tungstat, ore
DEGRADASI SENYAWA PARAQUAT DALAM PESTISIDA GRAMOXONE® SECARA FOTOLISIS DENGAN PENAMBAHAN TiO2-ANATASE Yuni Era; Safni -; Hamzar Suyani
Jurnal Riset Kimia Vol. 2 No. 1 (2008): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v2i1.122

Abstract

 ABSTRACT This research is conducted to know whether the photolysis method by adding TiO2-anatase can degrade the paraquat compound in Gramoxone pesticide. Photolysis method is conducted by using UV 10 watt lamp at the wavelength of 365 nm. The result shows that photolysis method could degrade the paraquat compound at 4.0 mg/L concentration as 16.02% after 60 minutes irradiation. Paraquat compound with the similar concentration by adding 10 mg unmixed TiO2-anatase could degrade 26.01% after 60 minutes irradiation and 62.30% by mixing TiO2-anatase. Furthermore, paraquat with the same concentration and TiO2-anatase addition could degrade 99.54% after 240 minutes irradiation. Keywords : degradation, photolysis, paraquat, anatase-TiO2
Co-Authors -, Fatmawinir -, Roswita -, Yefrida A.A. Ketut Agung Cahyawan W Abinul Hakim Admin Alif Admin Alif Admin Alif Admin Alif Amelia, Fitrah AMIN BAKTIAR Amri Bakhtiar Amri Bakhtiar Bakhtiar, Amri BUSTANUL ARIFIN Bustanul Arifin Citra Buhatika Desmiati - Deswati - Deswati Deswati Dewi Weltasari Dini Fatmi Dini Fatmi, Dini Dini Hariyati Adam Era, Yuni Fatmawinir - Fitrah Amelia Fitrah Amelia Hakim, Abinul HARRISUL RIVAI Harrizul Rivai HAZLI NURDIN Hazli Nurdin Hazli Nurdin Hazli Nurdin Hermansyah Aziz Hilfi Pardi Imelda - Liansari, Oktanora Mai Efdi Muhamad Nasir Muhamad Nasir, Muhamad Neila Yenni Nilam Sari Novesar Jamarun Nurdin, Hazli Oktanora Liansari Rini - Roswita - Safni Safni Sakai, Tadao Tadao Sakai Teguh B. Prasetyo Teguh Budi Prasetyo Umiati Loekman Umiati Loekman Umiati Loekman Willy Cahya Nugraha Willy Cahya Nugraha, Willy Cahya Yefrida - Yulizar Yusuf Yuni Era Yunita Salamah Zilfa Zilfa