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.
出处
《广西科学》
CAS
2000年第2期122-124,共3页
Guangxi Sciences
基金
广西教育厅科学基金
关键词
镉
流动注射分析
测定
分光光度法
BTDAB
显色剂
cadmium,flow injection analysis, benzothiazolyldiazo aminoazobenzene, spectrophotometry
