FANNY KURNYAWAN, . (2022) ANALISIS KADAR ION KOBALT DAN NIKEL DALAM MEDIUM AIR DENGAN METODE ELEKTROKIMIA. Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.
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Abstract
Pada penelitian ini, ion logam kobalt (Co) dan nikel (Ni) dalam larutan limbah dianalisa kadarnya menggunakan metode siklik voltametri (CV). Beberapa parameter elektrokimia meliputi rentang tegangan, scan rate, dan pH dikaji untuk menentukan kondisi pengukuran yang sesuai untuk elektroanalisa ion logam Co dan Ni dalam larutan. Dilakukan juga pengujian AAS untuk membandingkan hasil pengukuran kadar logam yang dihasilkan pada metode CV dengan AAS. Berdasarkan hasil pengujian, menunjukkan bahwa rentang tegangan pada -0,75 V sampai - 1,00 V, scan rate 250 mV/s, pH 3 (Ni) dan pH 7 (Co) merupakan parameter yang dapat digunakan untuk elektroanalisa ion logam karena menunjukkan arus puncak yang signifikan pada voltammogram CV. Pengukuran validasi rentang konsentrasi linier, limit deteksi, limit kuantitasi, dan keberulangan pengukuran Co dan Ni juga telah ditentukan. Rentang konsentrasi linier Co dan Ni masing-masing yaitu pada rentang 10 sampai 30 mM dan 15 sampai 40 mM. Koefisien korelasi Co dan Ni masing-masing 0,9992 dan 0,9994. Limit deteksi dan limit kuantitasi untuk Co berturut-turut 217,06 ppm dan 723,5 ppm, sedangkan untuk logam Ni beruturu-turut 274,99 ppm dan 916,66 ppm. Kedapatan ulangan logam Co dan Ni juga menunjukkan nilai yang baik (,5%) Dalam penelitian ini, kadar Co dan Ni pada sampel limbah yang diperoleh dengan metode voltametri siklik sebesar 510,2 ppm dan 1666,47 ppm yang sesuai dengan hasil yang diperoleh dari pengukuran AAS yaitu 510,7 ppm dan 1676 ppm. ************************************************************ In this research, cobalt (Co) and nickel (Ni) metal ions in the waste solution were analyzed using the cyclic voltammetry method (CV). Several electrochemical parameters including potential range, scan rate, and pH were studied to determine the appropriate measurement conditions for electroanalysis of Co and Ni metal ions in solution. AAS testing was also carried out to compare the results of measuring metal contents produced in the CV method with AAS. Based on the test results, it shows that the potential range at -0.75 V to - 1.00 V, scan rate at 250 mV/s, pH 3 (Ni) and pH 7 (Co) are parameters that can be used for electroanalysis of metal ions because it shows a significant peak current at the CV voltammogram. Validation measurements of linear concentration ranges, detection limits, quantitation limits, and recurrence of Co measurements. The linear concentration ranges of Co and Ni are in the range of 10 to 30 mM and 15 to 40 mM, respectively. The correlation coefficients of Co and Ni are 0.9992 and 0.9994, respectively. The detection limit and quantity limit for Co were 217.06 ppm and 723.5 ppm, while for Ni metals it was 274.99 ppm and 916.66 ppm. The Co and Ni metal test also showed good values (.5%) In this study, the Co and Ni contents in the waste samples obtained by the cyclic voltametry method were 510.2 ppm and 1666.47 ppm which corresponded to the results obtained from the AAS measurements of 510.7 ppm and 1676 ppm.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Additional Information: | 1). Dr. Setia Budi, M.Sc.; 2). Dr. Yusmaniar, M.Si., |
| Subjects: | Sains > Kimia |
| Divisions: | FMIPA > S1 Kimia |
| Depositing User: | sawung yudo |
| Date Deposited: | 04 Nov 2024 02:03 |
| Last Modified: | 04 Nov 2024 02:03 |
| URI: | http://repository.unj.ac.id/id/eprint/51899 |
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