| 催化极谱法快速测定硫磺中微量砷 |
| |
| 引用本文： | 蔡卓,吴健玲,朱晓韵,李树海,郑向明. 催化极谱法快速测定硫磺中微量砷[J]. 化学世界, 2001, 42(1): 14-16 |
| |
| 作者姓名： | 蔡卓 吴健玲 朱晓韵 李树海 郑向明 |
| |
| 作者单位： | 1. 广西大学化学化工学院,
2. 广西防城商检局, |
| |
| 基金项目： | 广西商检局资助项目 !(桂检科 [1997] 15 5 ) |
| |
| 摘 要： | 采用硫化铵分解硫磺试样 ,在 1 .46mol/L H3 PO4 、0 .8mol/L KI和 4.0 7× 1 0 -5mol/L Te( )体系中以催化极谱法测定微量砷。极谱峰电位为 - 0 .63V(相对饱和甘汞电极 )。砷浓度在 4～1 0 0 ng/m L范围内与峰电流有良好的线性关系 ,检出限为 2 ng/m L。方法的 RSD为 3.6%～ 4.6% ,加标回收率为 94%～ 97%。该法操作简便快速 ,用于硫磺样品测定 ,结果满意
|
| 关 键 词： | 硫 催化极谱法 砷 |
| 文章编号： | 0367-6358(2001)01-0014-03 |
Rapid Catalytic Polarographic Determination of Trace Arsenic in Sulphur |
| |
| CAI Zhuo ,WU Jian ling ,ZHU Xiao yun ,LI Shu hai ,ZHENG Xiang ming. Rapid Catalytic Polarographic Determination of Trace Arsenic in Sulphur[J]. Chemical World, 2001, 42(1): 14-16 |
| |
| Authors: | CAI Zhuo WU Jian ling ZHU Xiao yun LI Shu hai ZHENG Xiang ming |
| |
| Affiliation: | CAI Zhuo 1,WU Jian ling 1,ZHU Xiao yun 1,LI Shu hai 1,ZHENG Xiang ming 2 |
| |
| Abstract: | A new method for the determination of arsenic by catalyticpaparography in 1.46 mol/L phosphoric acid，0.8 mol/L potassium iodide and 4.07×10-5mol/L telliurium system was described. The peak potential was -0.63 V(vs.SCE). The peak height was linear with the concentration of arsenic in the range of 4～100 ng/mL. The detecfion limit was 2 ng/mL. The RSD was in the range 3.6%～4.6% and the recovery was 94%～97%. This method is simple and rapid, and has been used to determine the trace arsenic in sulphur sample. The samples were dissolved in ammonium sulfide and oxidized to ammonium sulfate by hydrogen peroxied in ammoniacal medium. |
| |
| Keywords: | sulphur catalytic polarography arsenic |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
