期刊论文

中文

分析测试学报

1004-4957

2004

23

2

89-91

10.3969/j.issn.1004-4957.2004.02.027

湖南省自然科学基金资助课题(99JJY20031);湖南省自然科学基金资助课题(99JJY20031)

本校为第一机构

研究了在磷酸介质中,铬(Ⅵ)-碘化钾-吖啶橙(AO)体系的共振散射光谱,考察了它们的光谱特征,影响因素和适宜的反应条件;确定了散射光强度与溶液中Cr(Ⅵ)浓度的关系,提出了共振光散射法测定Cr(Ⅵ)的新方法;该法在室温下进行,操作方便,具有较高的灵敏度和较好选择性;线性范围为0.008～0.48mg/L Cr(Ⅵ),方法的检出限为3.8 μg/L Cr(Ⅵ);用于环境水样中Cr(Ⅵ)的测定,结果满意.

The resonance light-scattering spectrum of Acridine orange in phosphoric acid medium was enhanced significantly in the presence of KI-Cr(Ⅵ) solution. The spectral characteristics, the affecting factors and the optimum conditions of the reaction were thus investigated. A new method based on the relationship of the intensity of resonance light-scattering to the concentration of chromium(Ⅵ) in water sample was established. This method can be operated conveniently at ambient temperature with high sensitivity and good selectivity. The detection li...