| 摘要: |
| 研究在Triton X-100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pH值9.5的硼砂-氢氧化钠缓冲溶液作载流,BTDAB和Triton X-100的混合液作试剂流,在520nm波长下测定镉。进样频率为120样次/小时,镉量在0mg/L~0.6 mg/L内遵守比尔定律,方法的检出限为2.0×10-8 g/ml。直接应用于废水中镉的测定,结果满意。 |
| 关键词: 镉 流动注射分析 苯并噻唑重氮氨基偶氧苯 分光光度法 |
| DOI： |
| 投稿时间：1999-12-07 |
| 基金项目:广西教育厅科学基金资助课题。 |
|
| Flow Injection Spectrophotometric for the Determination of Trace Cadmium |
|
Chen Ju, Zhao Shulin
|
| (Liuzhou Vocational-Technical College, 137 East Sanxiang, Rongjunlu, Liuzhou, Guangxi, 545005, China) |
| Abstract: |
| 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. |
| Key words: cadmium flow injection analysis benzothiazolyldiazo aminoazobenzene spectrophotometry |
