硝酸银试纸法检测乙炔气中硫磷含量的可靠性探究  

The reliability of the content of hydrogen sulfide and phosphine measured by the AgNO_3 indicator paper

作　　者：尚国隆 张恒云 钟洁水 杨霞[1] 

机构地区：[1]青岛科技大学计算机与化工研究所,山东青岛266042 [2]甘肃银光聚银化工有限公司PVC厂,甘肃白银730900 [3]青岛银科恒远化工过程信息技术有限公司,山东青岛266042

出　　处：《中国氯碱》2017年第12期27-30,共4页China Chlor-Alkali

摘　　要：建立了乙炔气中硫、磷含量的硝酸银试纸显色定性检测实验装置,并与化学法的定量检测结果进行对比,研究了试纸变色的硫、磷含量边界,并考察硫化氢用量对硝酸银试纸显色情况的影响。研究表明:硝酸银试纸即使30 s不显色,硫化氢含量仍在25×10^(-6)左右,磷化氢含量仍在60×10^(-6)左右。同时,硫化氢含量和用量对硝酸银试纸的显色有交互影响,浓度越低,显色时所需的气体用量越多,反之亦然。The experimental devices are established to detect the content of H_2S and PH_3 in crude acetylene qualitatively by the color of AgNO_3 indicator paper,and the results are compared with quantitative detection using chemical method. The content of H_2S and PH_3 are studied when the color displayed on the paper and investigating the influence of H_2S consumption on the AgNO_3 indicator paper. The results show that even though the indicator paper is colorless, the content of H_2S is about 25 ppm and PH_3 is about 60 ppm. Besides,the content and the total volume of H_2S have a direct affect on the color development of AgNO_3 indicator paper, the lower content and the higher volume of gas sample, vice versa.

关 键 词：硝酸银试纸 硫化氢 磷化氢 

分 类 号：O652[理学—分析化学] TQ221.242[理学—化学]