离子色谱法测定瓶装水中阴离子  

IC Determination of Anions in Bottled Water

作　　者：谢静[1] 杨树科[1] 戴建辉[1] 杨伟[1] 杨敏[1] 

机构地区：[1]云南民族大学化学与生物技术学院,昆明650500

出　　处：《理化检验（化学分册）》2011年第7期808-810,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：采用离子色谱法测定瓶装水中7种阴离子的含量。水样经Ion Pac AG14保护柱及IonPac AS14分离柱分离,以3.5mmol·L^(-1)碳酸钠-1.0mmol·L^(-1)碳酸氢钠溶液为淋洗液,采用抑制电导器检测。F^-和PO_4^(3-)分别在0.05～1.20mg·L^(-1)和0.80～3.00mg·L^(-1)范围内,Cl^-、NO_2^-、Br^-、NO_3^-和SO_4^(2-)均在0.20～4.80mg·L^(-1)范围内呈线性关系,检出限(3S/N)在0.025～0.126mg·L^(-1)之间。方法用于瓶装水中7种阴离子的测定,加标回收率在92.8%～102.0%之间,相对标准偏差(n=7)均小于4.0%。The contents of 7 anions in bottled water were determined by ion chromatography（IC）.The Ion Pac AG14 protective column and Ion Pac AS14 separation column were used for separation,and a mixture of solutions of 3.5 mmol·L^（-1） Na_2CO_3 and 1.0 mmol·L^（-1） NaHCO_3 was used as eluant.Inhibitory conductivity detection was adopted in the determination.Linearity was found in ranges of 0.05-1.20 for F and 0.80- 3.00 mg·L^（-1） for PO_4^（3-）,and linearity for Cl^-、NO_2^-、Br^-、NO_3 and SO_4^（2-） was found to be in the same range of 0.20-4.80 mg·L^（-1）,with detection limit（3S/N） in the range of 0.025-0.126 mg·L^（-1）.The proposed method was applied to the determination of the 7 anions in bottled water,values of recovery found by standard addition method were in the range of 92.8%-102.0%,and RSD＇s（n=7） were less than 4.0%.

关 键 词：离子色谱法 瓶装水 阴离子 

分 类 号：O652.63[理学—分析化学]