摘要
本文建立了微波消解预处理-离子色谱法(IC)测定电镀污泥中氯离子含量的方法,并对其中消解液用量、消解时间和温度等条件进行了优化。研究结果显示:当消解液加入量8 mL、消解时间4 h和消解温度60℃时,该方法获得最优的加标回收率;在最佳预处理条件下,氯离子标准曲线方程y=0.1529x+0.0321(R~2=0.9998),方法检出限0.005 mg/L,相对标准偏差(RSD)0.77%,在标准曲线范围内加标回收率96.17%~104.09%。经实样测试,电镀污泥中氯离子含量范围为43321~62113 mg/kg,且检测结果相对标准偏差(RSD)<3%,该方法线性关系、灵敏度、精密度及加标回收率均满足检测需求,可批量检测,简便易操作,具有一定的推广应用价值。
Based on microwave digestion pretreatment-ion chromatography(IC),an analytical method was established for the determination of chloride ion content in electroplating sludge,and the consumption of digestion solution,digestion time and digestion temperature were optimized by experimental conditions.The results show that the best addition standard recovery can be obtained by such method when the amount of digestion solution is 8 mL,the digestion time is 4 h and the digestion temperature is 60 ℃.Under the optimal pre-treatment conditions,the standard curve equation of chloride ion was y=0.152 9x+0.032 1(R~2=0.999 8),the detection limit of themethod was 0.005 mg/L the relative standard deviation(RSD) was 0.77% and the addition standard recovery ranged from 96.17% to 104.09% within the scope of standard curve.In the actual electroplating sludge sample detection,it could be seen that the content of chloride ions in electroplating sludge ranged from 43 321 mg/kg to 62 113 mg/kg,and the RSD values of the detection results were less than 3%.This indicates that the linear relationship,sensitivity,precision and addition standard recovery of this method can meet the detection requirements and has certain value of popularization and application due to batch detection,simple and easy operation.
作者
林艺
黄晶
张文锦
张蕾
LIN Yi;HUANG Jing;ZHANG Wen-jin;ZHANG Lei(Longxi County Environmental Monitoring Station,Longxi 748100,China;Shandong Province Zaozhuang Ecological Environment Monitoring Center,Zaozhuang 277000,China;Gansu Province Dingxi Ecological Environment Monitoring Center,Dingxi 743000,China)
出处
《中国有色冶金》
CAS
北大核心
2022年第6期60-64,109,共6页
China Nonferrous Metallurgy
基金
甘肃省自然科学基金(NO.21JR7RA692)。
关键词
微波消解
离子色谱法
电镀污泥
氯离子含量
消解时间
批量检测
microwave digestion
ion chromatography
electroplating sludge
chloride ion content
decomposition time
batch detection
