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All Journal Eksakta : Berkala Ilmiah Bidang MIPA Fullerene Journal of Chemistry Oxygenius Journal Of Chemistry Education
Abdon Saiya
Universitas Negeri Manado
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Mechanical Engineering

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Journal : Fullerene Journal of Chemistry

 1 
Optimasi dan validasi metode analisis residu klorpirifos menggunakan High Performance Liquid Chromatography (HPLC) Abdon Saiya; Dokri Gumolung; Dian Herlinda Octorina Howan
Jurnal Kimia Fullerene Vol 2 No 2 (2017): Fullerene Journal of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (660.414 KB) | DOI: 10.37033/fjc.v2i2.20

Abstract

One of the most sensitive and selective instrumentation techniques for the analysis of pesticide residues in vegetables at a high level is High Performance Liquid Chromatography (HPLC). To obtain optimum result of measurement, optimization and validation of measurement method is needed. The purpose of this research is to optimize and validate the determination of chlorpyrifos concentration by HPLC method, so it can be used for analysis of chlorpyrifos residues in samples of cabbage vegetables taken from some traditional markets in North Sulawesi. Optimized chromatographic parameters are the composition of mobile phase of water and acetonitrile, mobile phase flow rate, and the volume of the sample injection. While the validated measurement parameters include precision, linearity, detection limits, and quantitation limits. Based on the results obtained using Zorbax Eclipse Plus C18 column, the optimum condition of HPLC was achieved at λmax of 289 nm, mobile phase composition of water : acetonitrile was 10:90, mobile phase flow rate of 0.70 mL/min, and sample injection volume of 15 μL. The result of validation of analytical method shows that analytic performance of determination of chlorpyrifos with HPLC method is very good, it is indicated by measurement parameter such as precision shown with coefficient of variation (CV) was 0,2086%, linearity indicated by correlation coefficient (r) was 0.9963, the detection limit (LOD) of 0.67 ppm, and the quantitative limit (LOQ) of 2.24 ppm, which all meet the requirements. The results of this study indicate that this method can be used for analysis of chlorpyrifos residues in cabbage vegetable samples.
Analisis Residu Pestisida dalam Tomat, Cabai Rawit dan Wortel dari Beberapa Pasar Tradisional di Sulawesi Utara Abdon Saiya; Dokri Gumolung; Joice Dorsila Susana Caroles
Jurnal Kimia Fullerene Vol 3 No 2 (2018): Fullerene Journal of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (466.576 KB) | DOI: 10.37033/fjc.v3i2.40

Abstract

One method to eradicate plant pests carried out by farmers in the North Sulawesi area is to use pesticides because they are considered easy to obtain, the price is still affordable, and very effective at killing plant pests. However, improper use of pesticides results in the loss of pesticide residues in plants which causes environmental pollution, health problems in humans and inhibits trade. Therefore, it is necessary to monitor the use of pesticides through the fulfillment of the maximum residual limit (BMR). This study aims to analyze pesticide residues in tomatoes, cayenne pepper, and carrots using the method of High Performance Liquid Chromatography (HPLC) which was previously optimized and validated. The research samples were tomatoes, cayenne pepper, and carrots, taken from Pasar Bersehati Tomohon, Pasar Karombasan Manado, and Pasar Kawangkoan Minahasa, then taken to the Chemistry Laboratory of Manado State University to be extracted and analyzed. The results of this study indicate that pesticides with chlorpyrifos active ingredients were detected in almost all samples analyzed, although the levels were still below the specified BMR value, ie 1 mg/kg sample. The highest chlorpyrifos level was found in tomato samples taken from Pasar Kawangkoan Minahasa, which was 0.3150 mg/kg. The results of this study also showed that samples that were washed before extraction caused a decrease in the residual content of the petisides.
VALIDASI METODE ANALISIS BETA KAROTEN MENGGUNAKAN KCKT DAN APLIKASINYA PADA PENATAPAN KADAR BETA KAROTEN DALAM BUAH LABU KUNING Abdon Saiya; Joice Caroles
Jurnal Kimia Fullerene Vol 7 No 1 (2022): Fullerene Journal of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v7i1.380

Abstract

Salah satu teknik instrumentasi yang akurat, sensitif dan selektif untuk penentuan kadar β-karoten adalah spektofotometri UV-Vis. Untuk memperoleh hasil pengukuran yang valid dan dapat dipercaya, maka harus dilakukan validasi metode pengukuran tersebut. Tujuan penelitian ini adalah untuk melakukan validasi penetapan kadar β-karoten dengan metode spektrofotometri UV-Vis dan menerapkannya pada sampel labu kuning. Parameter yang validasi antara lain akurasi, presisi, linieritas, limit deteksi dan limit kuantitas. Berdasarkan hasil yang telah dicapai dalam penelitian ini, maka dapat disimpulkan bahwa kinerja analitik penetapan kadar β-karoten dengan Spektrofotometri UV-Vis tergolong sangat baik, hal ini ditunjukkan dengan parameter pengukuran seperti: akurasi yang ditunjukkan oleh persen perolehan kembali pada rentang 98 – 101 % , presisi ditunjukkan dengan koefisien variasi (KV) = 1,079%, linearitas ditunjukkan dengan koefisien korelasi (r) = 0,9996, batas deteksi (LOD) = 0,0011 ppm, dan batas kuantitasi (LOQ) = 0,0036 ppm, yang semuanya memenuhi persyaratan. Kadar β-karoten dalam jonjot buah labu kuning yang dianalisa berkisar antara 9,52 – 13,76 μg/gram sampel.
"Optimasi Absorpsi Ion Logam Zn Menggunakan Arang Daun Eceng Gondok (Eichhornia crassipes) Sebagai Absorben" hesky julio koloay; Abdon Saiya; Soenandar Tengker
Jurnal Kimia Fullerene Vol 8 No 2 (2023): Fullerene Journal of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v8i2.566

Abstract

Tanaman eceng gondok (Eichhornia crassipes) sebagian besar tersusun dari selulosa dimana selulosa yang terdapat dalam eceng gondok ini yang menjadi situs aktif dalam proses penyerapan ion logam. Penelitian ini bertujuan untuk melakukan optimasi terhadap absorpsi ion logam Zn dengan menggunakan arang daun eceng gondok. Arang eceng gondok dikontakkan pada larutan seng dengan menggunakan parameter waktu kontak dan pH kemudian diukur nilai absorpsinya dengan spektrofotometer serapan atom. Dari data yang diperoleh, waktu kontak optimum terjadi pada 60 menit dengan nilai absorpsi 1,91 ppm. Untuk pH optimum dari penyerapan ion logam seng terjadi pada pH 6 dengan konsentrasi ion logam yang terserap sebesar 93,062 ppm.
Co-Authors Avni Dalemeng Deysi Natalia Demo Dian Herlinda Octorina Howan Djefry Tani Dokri Gumolung Freetje Waworuntu hesky julio koloay Jeivana Laluas Joice Dorsila Susana Caroles Lauren Cornelia Agatha Rini Yasinta Sasuang Soenandar Tengker