首页|基于激光诱导击穿光谱技术的水中氮元素检测

基于激光诱导击穿光谱技术的水中氮元素检测

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利用气溶胶辅助激光诱导击穿光谱(LIBS)技术实现了对水中富营养化元素氮的实时在线准确快速检测.针对传统的同心雾化器对液体的进样量受液体物理性质限制的缺陷,本文采用微量注射泵辅助进样实现不同盐度待测样的相同进样量.结果表明,采用微量注射泵,N I 746.831 nm绝对光谱强度的平均相对标准偏差DRSAV由19.51%改善至6.78%,定量分析检测极限 LoD 由5.45改善至1.57 mg/L,预测浓度与制备浓度的线性决定系数R2、平均相对误差 ER 和交叉验证均方根误差 ERMSCV 分别由 0.2830、45.80%和 23.96 mg/L 改善至 0.9043、10.33%和4.28 mg/L.本研究的结果表明微量注射泵辅助进样可实现气溶胶辅助LIBS技术对水中氮元素的精准灵敏检测.
Determination of nitrogen in water based on laser-induced breakdown spectroscopy
Real-time,online,accurate,and rapid detection of eutrophic element nitrogen in water was achieved using aerosol assisted laser-induced breakdown spectroscopy(LIBS)in this work.In response to the limitation that the liquid lifting capacity of traditional concentric atomizer is affected by liquid physical characteristics,a micro-volume syringe pump is used in this work to achieve the same liquid lifting volume of samples with different salinity.As a result,the average relative standard deviation(DRSAV)of the absolute intensity of N I peak at 746.831 nm is reduced from 19.51%to 6.78%,the limit of detection(LoD)is improved from 5.45 mg/L to 1.57 mg/L,and the linear correction coefficient R2,average relative error(ER),and root mean square error of cross validation(ERMSCV)are improved from 0.2830,45.80%,and 23.96 mg/L to 0.9043,10.33%,and 4.28 mg/L,respectively.The results of this work indicate that the liquid aerosol assisted LIBS with the assistance of a micro injection pump for sample injection can be applied for accurate and sensitive detection of nitrogen in water.

spectroscopylaser-induced breakdown spectroscopywateraerosolnitrogenmicro-volume syringe pump

杨新艳、王鑫、李东东、王玺、祝鹏、刘昌、张徐、任红梅、秦正波、华泽丰、郑贤锋

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安徽师范大学物理与电子信息学院,安徽 芜湖 241002

光电信息材料功能调控与应用安徽省重点实验室,安徽 芜湖 241002

国防科技大学电子对抗学院,安徽 合肥 230037

光谱学 激光诱导击穿光谱 气溶胶 微量注射泵

安徽省高等学校省级质量工程项目安徽省大学生创新创业训练计划先进激光技术安徽省实验室项目先进激光技术安徽省实验室项目安徽省高等学校协同创新项目河北省先进激光技术与装备重点实验室开放基金国防基础科研项目脉冲功率激光技术国家重点实验室项目

2020jyxm0657202310370679AHL2020KF03AHL2021ZR04GXXT-2021-029HBKL-ALTE2024011JCKY2023230C010SKL2022ZR10

2024

量子电子学报
中国光学学会基础光学专业委员会 中国科学院合肥物质科学研究院

量子电子学报

CSTPCD北大核心
影响因子:0.67
ISSN:1007-5461
年,卷(期):2024.41(3)
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