硫化氢现场半定量检测方法研究

庄小舟; 彭建梅; 叶立和; 蔡小璇; 张凤华; 钟苑琴

doi:10.16369/j.oher.issn.1007-1326.2019.03.024

硫化氢现场半定量检测方法研究

Study on on-site semi-quantitative determination of hydrogen sulfide

摘要

摘要:
目的基于硝酸银比色法建立一种准确、简易可行的硫化氢现场半定量检测方法。
方法在采样点用一支装有10.0 mL硫化氢吸收液的多孔玻板吸收管，以0.5 L/min流量采集5 min空气样品。现场取5.0 mL吸收液用硝酸银显色剂快速显色，与阳性对照试剂和阴性对照试剂进行目视比色。
结果方法的半定量结果准确，最低检出浓度为1.6 mg/m³，相对标准偏差为3.2%。常见的无机阴离子对结果不产生干扰。
结论本方法经济成本低，简易可行，现场测定结果与实验室检测结果量值溯源统一，适用于隐匿性硫化氢的现场调查。

Abstract:
Objective To establish a simply practicable semi-quantitative detection method of hydrogen sulfide based on silver nitrate colorimetry.
Methods At the sampling site, a multi-hole absorbing tube containing 10.0 mL hydrogen sulfide absorbing solution was used to collect air sample for 5 minutes at 0.5 L/min sampling flow. Then, 5.0 mL absorbing solution was rapidly colored with silver nitrate and the color was visual colorimetric determined, compared with both positive and negative control reagent.
Results The method showed that the semi-quantitative determination results were accurate, with detection limit 1.6 mg/m³ and relative standard deviation(RSD)3.2%. The common inorganic anions had no interference.
Conclusion This method is low cost, convenient, simple, and applicable for the investigation of hidden hydrogen sulfide.

HTML全文

参考文献(20)

施引文献

资源附件(0)