| 便携式气相分子吸收光谱仪在水质硫化物应急监测中的应用 |
| Application of Portable Gas Phase Molecular Absorption Spectrometer in Emergency Monitoring of Sulphide in Water |
| 投稿时间：2023-06-28 修订日期：2024-01-09 |
| DOI：10.19316/j.issn.1002-6002.2024.06.24 |
| 中文关键词: 应急监测 硫化物 便携式气相分子吸收光谱仪 稳定性 |
| 英文关键词:emergency monitoring sulphide portable gas phase molecular absorption spectrometer stability |
| 基金项目:国家重点研发计划专项(2018YFF01011705) |
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| 通讯作者:樊占春* 山西省生态环境厅, 山西 太原 030027 |
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| 中文摘要: |
| 建立了快速准确的水质硫化物应急监测方法。对固定化条件、pH、保存时间等影响准确度的因素进行了研究;结合产业特点、类型识别、实验分析等手段,确定干扰物质及其剂量,提出适用于应急监测的前处理方法;研究了仪器内置曲线特性,并对地下水、地表水、工业废水等进行测定。结果表明:样品中添加乙酸锌-乙酸钠固定剂,调节pH至10~12,可提高样品的稳定性和保存期限。SO32-和S2O32-产生光谱正干扰,采用沉淀分离法进行前处理。便携式气相分子吸收光谱仪测定速度快、抗干扰能力强、可实现自动化批量进样,仪器内置曲线精密度和准确度好,不同类型水样测定的精密度为1.6%~9.3%,加标回收率为88.4%~95.8%,满足应急监测快速准确的要求,可为突发性环境事件水质硫化物的测定提供技术参考。 |
| 英文摘要: |
| A rapid and accurate emergency monitoring method for sulfide in water was established in this paper. The factors affecting the accuracy such as immobilized conditions, pH value and storage time were studied. Combined with industrial characteristics,type identification,experimental analysis to determine the interfering substances and doses, and put forward the pretreatment method suitable for emergency monitoring. The characteristics of calibration curve were studied, and the ground water,surface water and industrial wastewater were measured. The results showed that the stability and storage time of the sample could be improved by adding zinc acetate and sodium acetate fixative and adjusting pH to 10-12. SO32- and S2O32- produce positive spectral interference,copper ion and mercury ion produce negative chemical interference,and precipitation separation method is used for pretreatment. Portable gas phase molecular absorption spectrometer has high determination speed,strong anti-interference ability,and can realize automatic batch injection. The built-in curve of the instrument has good reproducibility and accuracy. The precision of different types of water samples is 1. 6% -9. 3%,and the standard recovery rate is 88. 4% -95. 8%,which meets the requirements of rapid and accurate emergency monitoring. It provides a technical reference for the determination of sulfide in water of sudden environmental events. |
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