A novel, simple method for determination of Cr(Ⅲ)in environmental samples
根据Luminol H2O2 Cr(Ⅲ)体系在碱性条件下产生很强的化学发光的原理,用光电二极管作检测器测定环境样品中的Cr(Ⅲ)。本方法具有分析速度快、选择性好、检测装置结构非常简单,成本低等优点。其检测限为5.0×10-8g/mL,线性范围为5.0×10-8～5.0×10-4g/mL,相对标准偏差小于5.0%。在实际样品的分析中,取得了令人满意的结果。A novel, simple analytical procedure for determination of chromium(Ⅲ) in environmental samples with photoelectric diode detector is presented successfully, which is based on the fact that which is based on the principle that the system of luminol-H_2O_2-Cr(Ⅲ) can yield strong chemiluminescence The single analyzing time is less than 1 min.The linearity range is 5.0×10~(-8)～5.0×10~(-4) g/mL . The detection limit is 5.0×10~(-8) g/mL . The RSD is less than 5.0%(n=6). And it's detecting equipment is simple and cheap. The method has been applied to the determination of Cr(Ⅲ) in environmental samples successfully .