流动注射分光光度法测定微量镉的研究  

Flow Injection Spectrophotometric for the Determination of Trace Cadmium

作　　者：陈菊[1] 赵书林[2] 

机构地区：[1]柳州职业技术学院,柳州市荣军路东三巷137号545005 [2]广西师范大学化学化工系,桂林市育才路3号541004

出　　处：《广西科学》2000年第2期122-124,共3页Guangxi Sciences

基　　金：广西教育厅科学基金

摘　　要：研究在 Triton X- 10 0存在下 ,以苯并噻唑重氮氨基偶氮苯 (BTDAB)为显色剂的流动注射分光光度法测定微量镉的新方法。用 p H值 9.5的硼砂 -氢氧化钠缓冲溶液作载流 ,BTDAB和 Triton X- 10 0的混合液作试剂流 ,在 5 2 0 nm波长下测定镉。进样频率为 12 0样次 /小时 ,镉量在 0 mg/ L～ 0 .6 mg/ L内遵守比尔定律 ,方法的检出限为 2 .0× 10 - 8g/ m l。直接应用于废水中镉的测定 ,结果满意。A flow injection spectrophotometric for the determination of trace codmium was developed.This method used pH9 5 borax sodium hydroxide buffer solution as the carrier flow, the mixed solution of benzothiazolydiazo aminoazobenzene(BTDAB) and Triton X 100 as the reagent.Cadmium formed an orange red complex with BTDAB, which was detected at 520 nm. The sampling frequency was 120 samples/hour. Beer's law was obeyed by cadmium in the range from 0 mg/L to 0 6 mg/L. The detection limit was 2 0 × 10 -8 g/ml. The proposed method was applied to the determination of trace cadmium in waste water with satisfactory results.

关 键 词：镉 流动注射分析 测定 分光光度法 BTDAB 显色剂 

分 类 号：O614.242[理学—无机化学] O657.3[理学—化学]