氢氦气氛液体阴极辉光放电原子发射光谱法在线检测污水中的铬

引用本文: 陈翔宇, 蔡朝晴, 潘裕柏, 汪正. 氢氦气氛液体阴极辉光放电原子发射光谱法在线检测污水中的铬[J]. 分析化学, 2022, 50(8): 1252-1259. doi: 10.19756/j.issn.0253-3820.221145 shu

Citation: CHEN Xiang-Yu, CAI Zhao-Qing, PAN Yu-Bai, WANG Zheng. Solution Cathode Glow Discharge Atomic Emission Spectrometry in Hydrogen-Helium Atmosphere for On-line Determination of Chromium in Sewage[J]. Chinese Journal of Analytical Chemistry, 2022, 50(8): 1252-1259. doi: 10.19756/j.issn.0253-3820.221145 shu

氢氦气氛液体阴极辉光放电原子发射光谱法在线检测污水中的铬

陈翔宇 ^1,2, ,
蔡朝晴 ^2, ,
潘裕柏 ^1, ,
汪正 ^{2,
,}

1.
上海师范大学数理学院, 上海 200234;
2.
中国科学院上海硅酸盐研究所, 上海 201899

通讯作者: 汪正,E-mail:wangzheng@mail.sic.ac.cn

基金项目:
国家自然科学基金项目(No.E27GJ616)、中国科学院装备研制项目(No.YZ201539)和上海无机材料测试与表征技术平台项目(No.19DZ2290700)资助。

摘要: 建立了一种氢氦混合气氛液体阴极辉光放电原子发射光谱(SCGD-AES)测定污水中铬含量的方法,结果表明,氢氦混合气氛(H₂掺杂量3%)有利于SCGD-AES激发条件的改善。优化了气体流量、电解液种类及流速、放电电压及间距等实验参数,铬的检出限从650 μg/L (空气气氛)降至106 μg/L,并且保持了良好的稳定性(RSD=1.3%,10 mg/L,n=11)。本方法对糙米粉标准物质(GBW (E)100619)及实际工业污水中铬含量的测定结果与电感耦合等离子体发射光谱法(ICP-OES)的测定值一致,回收率为92.4%~104.0%,表明本方法可应用于实际水样中铬含量的检测。

关键词:

English

Solution Cathode Glow Discharge Atomic Emission Spectrometry in Hydrogen-Helium Atmosphere for On-line Determination of Chromium in Sewage

1.
College of Mathematics and Physics, Shanghai Normal University, Shanghai 200234, China;
2.
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China

Corresponding author: WANG Zheng, wangzheng@mail.sic.ac.cn

Received Date: 23 March 2022
Revised Date: 27 April 2022
Fund Project:
Supported by the National Natural Science Foundation of China (No.E27GJ616), the Instrument Development Project of the Chinese Academy of Sciences (No.YZ201539) and the Shanghai Technical Platform for Testing and Characterization on Inorganic Materials (No.19DZ2290700).

Abstract: Solution cathode glow discharge atomic emission spectrometry (SCGD-AES) has many advantages such as low power consumption, small size and simple operation. It is an ideal choice for on-line analysis of field samples. However, the low power consumption leads torelatively limited excitation capacity, which limits the detection performance of high excitation potential elements, such as chromium. In this study, a method for determination of chromium (Cr) content in sewage by solution cathode glow discharge atomic emission spectrometry operated in hydrogen-helium mixed atmosphere was established. It was found that the excitation conditions of SCGD-AES could be improved in hydrogen-helium mixed atmosphere (H₂ content of 3%). The experimental parameters such as gas flow rate, electrolyte type and flow rate, discharge voltage and spacing were optimized. The results showed that the limit of detection (LOD) of Cr was improved from 650 μg/L (discharging in air) to 106 μg/L with great repeatability (RSD=1.3%, 10 mg/L, n=11). The determination results of Cr in brown rice flour reference material (GBW(E)100619) and actual industrial sewage by this method were consistent with those obtained by inductively coupled plasma-optical emission spectroscopy (ICP-OES)and the recoveries were 92.4%-104.0%, indicating that this method had superb application prospect in determination of Cr in water samples.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

氢氦气氛液体阴极辉光放电原子发射光谱法在线检测污水中的铬

通讯作者: 汪正,E-mail:wangzheng@mail.sic.ac.cn

English

Solution Cathode Glow Discharge Atomic Emission Spectrometry in Hydrogen-Helium Atmosphere for On-line Determination of Chromium in Sewage

Corresponding author: WANG Zheng, wangzheng@mail.sic.ac.cn

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

氢氦气氛液体阴极辉光放电原子发射光谱法在线检测污水中的铬

通讯作者: 汪正,E-mail:wangzheng@mail.sic.ac.cn

English

Solution Cathode Glow Discharge Atomic Emission Spectrometry in Hydrogen-Helium Atmosphere for On-line Determination of Chromium in Sewage

Corresponding author: WANG Zheng, wangzheng@mail.sic.ac.cn

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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