亚甲基蓝分光光度法测定空气中硫化氢的研究  

Study on the Determination of Hydrogen Sulfide in Air by Methylene Blue Spectrophotometry

作　　者：温钰婷 WEN Yuting(Guangdong Product Quality Supervision and Inspection Institute,Guangzhou,Guangdong Province,510700 China)

机构地区：[1]广东产品质量监督检验研究院,广东广州510700

出　　处：《大众科学》2024年第20期103-105,共3页China Public Science

摘　　要：研究了空气中硫化氢的甲基蓝分光光度法的各项性能指标。结果表明:该方法的标准曲线相关系数为0.9997,定量下限为0.13μg(以5 mL吸收液计),最低定量浓度c=0.017 mg/m^(3)(以采集7.5 L空气样品计),精密度(RSD,n=6)为0.65%~1.97%,加标回收率为98.0%~101.9%,当氮氧化物干扰量小于4.0μg/5 mL时,不会干扰硫化氢的测定。本方法灵敏度高、吸收效果好、稳定性高,具有普遍适用性。The performance indicators of the methylene blue spectrophotometric method for the determination of hydrogen sulfide in air were studied.The results showed that the correlation coefficient of the standard curve for this method was 0.9997,the limit of quantitation was 0.13μg(based on 5 mL of absorption solution),the lowest quantitative concentration was c=0.017 mg/m³(based on the collection of 7.5 L of air sample),the precision(RSD,n=6)ranged from 0.65%to 1.97%,and the recovery rate of standard addition was between 98.0%and 101.9%.When the interference amount of nitrogen oxides was less than 4.0μg/5 mL,it did not interfere with the determination of hydrogen sulfide.This method is characterized by high sensitivity,good absorption effect,high stability,and universal applicability.

关 键 词：硫化氢 亚甲基蓝分光光度法 空气污染 职业卫生检测技术 

分 类 号：X831[环境科学与工程—环境工程]