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杨胜科, 崔文夏, 赵钺, 陈静, 刘凯, 李斌. 过硫酸钠氧化-流动注射化学发光法在地下水腐植酸含量测定中的应用[J]. 岩矿测试, 2012, 31(4): 677-681.
引用本文: 杨胜科, 崔文夏, 赵钺, 陈静, 刘凯, 李斌. 过硫酸钠氧化-流动注射化学发光法在地下水腐植酸含量测定中的应用[J]. 岩矿测试, 2012, 31(4): 677-681.
YANG Sheng-ke, CUI Wen-xia, ZHAO Yue, CHEN Jing, LIU Kai, LI Bin. Determination of Humic Acid in Groundwater by the Sodium Persulfate Oxidization Flow-Injection Chemiluminescence Method[J]. Rock and Mineral Analysis, 2012, 31(4): 677-681.
Citation: YANG Sheng-ke, CUI Wen-xia, ZHAO Yue, CHEN Jing, LIU Kai, LI Bin. Determination of Humic Acid in Groundwater by the Sodium Persulfate Oxidization Flow-Injection Chemiluminescence Method[J]. Rock and Mineral Analysis, 2012, 31(4): 677-681.

过硫酸钠氧化-流动注射化学发光法在地下水腐植酸含量测定中的应用

Determination of Humic Acid in Groundwater by the Sodium Persulfate Oxidization Flow-Injection Chemiluminescence Method

  • 摘要: 在碱性条件下过硫酸钠能氧化腐植酸发生化学发光反应。本研究以过硫酸钠-腐植酸化学发光体系为基础,建立了腐植酸的过硫酸钠氧化-流动注射化学发光测定方法,同时对测定方法的负高压及增益、泵速、过硫酸钠浓度、氢氧化钠浓度等影响因素进行了优化实验。方法的线性范围为0.1~500 mg/L(相关系数为0.9985),检出限为0.076 mg/L,对浓度为0.5 mg/L的腐植酸进行11次平行测定,相对标准偏差(RSD)为3.47%。利用该方法对5种不同地区地下水中的腐植酸进行测定,样品的加标回收率在98.33%~107.50%之间。该方法无需分离,简单易行,对实际样品测定结果满意。

     

    Abstract: Based on systematic studies, sodium persulfate has a photochemical reaction to oxidize humic acid under alkaline conditions. The photochemical dynamic curve of Na2S2O8-humic acid system has been established. The reaction conditions were optimized for negative high voltage, gain, pump speed, Na2S2O8 and NaOH concentration. A new photochemical analysis method to determine humic acid in loess has been established with a linear range from 0.1 mg/L to 500 mg/L (R=0.9985) and a detection limit of 0.076 mg/L. Eleven replicate determinations were conducted on 0.5 mg/L humic acid, and the calculated relative standard deviation (RSD) was 3.47%. According to the determinations of humic acid from 5 different groundwater samples with an internal calibration, the standard recovery rates of the samples were between 98.33% and 107.50%. This method was successful in the determination of humic acid without any separation.

     

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