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Studi Analisis Kobalt secara Kolorimetri dengan 1-Nitroso-2-Naftol

Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University, Indonesia

Published: 1 Apr 2003.
Open Access Copyright 2003 Jurnal Kimia Sains dan Aplikasi under http://creativecommons.org/licenses/by-sa/4.0.

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Abstract
Penelitian tentang studi analisis kobalt secara kolorimetri dengan l-nitroso-2-naftol telah dilakukan. Reaksi pembentukan kompleks dilakukan pada pH 9. Hasil penelitian diperoleh kompteks kobalt yang terbentuk mempunyai bilangan koordinasi tiga. Kompleks yang terbentuk mengikuti alur Hukum Beer sampai konsentrasi 4·10-4 M.  Adanya ion nikel dan ion besi masing-masing sampai konsentrasi 20 mg/L dan 5 mg/L, tidak memberikan gangguan analisis, sedangkan konsentrasi besi lebih besar dari 6 mg/L menyebabkan deviasi positif.
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Keywords: Kolorimetri; kompleks kobalt, interferensi

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