Spectrophotometric determination of trace amounts of cadmium using Cd(II)-KI-Crystal violet system in the presence of triton X-100 and PVA期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Spectrophotometric determination of trace amounts of cadmium using Cd(II)-KI-Crystal violet system in the presence of triton X-100 and PVA

Authors:	Jie Hu Wen-Bin Qi Bin-yin Pu

Institution:	(1) Research Laboratory of Applied and Engineering Chemistry, Ningbo University, Ningbo, Zhejiang, China;(2) Department of Chemistry, Hangzhou University, Hangzhou, Zhejiang, China;(3) Department of Chemistry, Ningbo Teacher's College, Ningbo, Zhejiang, China

Abstract:	A new highly sensitive spectrophotometric method for determination traces of cadmium using Cd-(II)-KI-Crystal Violet system in the presence of Triton X-100-poly(vinyl) alcohol (PVA) mixture has been developed. The apparent molar absorptivity of the system is 1.77 × 10⁵ 1-mol^–1 cm^–1 and its Sandell's sensitivity is 6.35 × 10^–4 g·Cd·cm^2–. Beer's law is obeyed up to 0.32 g·Cd(II)·ml^–1. The method has been applied to determine Cd(II) in waste water, rice and pork meat samples with satisfactory results.

Keywords:	nonionic surfactant spectrophotometric determination multicomponent complex cadmium colour reaction
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