| 离子色谱法测定柠檬酸、柠檬酸钠中的F~-、Cl~-、SO_4~(2-)、C_2O_4~(2-)等 |
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| 引用本文： | 崔鹤,刘亮,蔡发,李凤琪.离子色谱法测定柠檬酸、柠檬酸钠中的F~-、Cl~-、SO_4~(2-)、C_2O_4~(2-)等[J].化学分析计量,1999(4). |
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| 作者姓名： | 崔鹤 刘亮 蔡发 李凤琪 |
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| 作者单位： | 山东出入境检验检疫局，山东出入境检验检疫局，山东出入境检验检疫局，山东出入境检验检疫局 青岛 266002，青岛 266002，青岛 266002，青岛 266002 |
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| 摘 要： | 利用离子色谱仪,对柠檬酸、柠檬酸钠中的痕量F~-、Cl~-、SO_4~(2-)、C_2O_4~(2-)等进行测定,采用DIONEX ION PAC ASll-HC分离柱,以电导检测器检测,对淋洗分离条件进行了试验。选择NaOH作淋洗液,0.025～0.050mol/L NaOH做梯度淋洗,可使F~-、Cl~-、SO_4~(2-)、C_2O_4~(2-)等很好地分离,其中Cl~-在0.01～200mg/L,F~-在0.05～200mg/L,SO_4~(2-)在0.05～200mg/L,C~2O_4~(2-)在0.1～200mg/L范围内,浓度和响应值有良好的线性关系,检出限分别为F~-0.01mg/L、Cl~-0.01mg/L、SO_4~(2-)0.03mg/L、C_2O_4~(2-)0.03mg/L,回收率为90％～110％。该方法无需前处理,无基体干扰,可用于柠檬酸、柠檬酸钠中F~-、Cl~-、SO_4~(2-)、C_2O_4~(2-)的测定。
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| 关 键 词： | 离子色谱 柠檬酸 柠檬酸钠 阴离子 |
DETERMINATION OF F-,C1-,SO42-,C2O42- IN CITRIC ACID AND SODIUM CITRATE BY ION CHROMATOGRAPHY |
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| Cui He,Liu Liang,Gai Fa,Li Fengqi.DETERMINATION OF F-,C1-,SO42-,C2O42- IN CITRIC ACID AND SODIUM CITRATE BY ION CHROMATOGRAPHY[J].Chemical Analysis And Meterage,1999(4). |
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| Authors: | Cui He Liu Liang Gai Fa Li Fengqi |
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| Abstract: | The determination of F.,Cl-,SO42-,C2O42-in citric acid and sodium citrate is carried out on Ion Chromatograph with DIONEX ION PAC AS11-HC anion exchange column and electrical conductivity detector.Using a 0.025-0.05 mol/L aqueous sodium hydroxide gradient,F-,C1-,SO42-and C2O42-are well separated.The concentration has a good linear relationship with its response within the scope of F-in 0.05 ~ 200 mg/L,Cl-in 0.01 ~ 200 mg/L,SO42-in 0.05 ~ 200 mg/L and C2O42-in 0.01 ~ 200 mg/L.The limit of detection of each anion is F" in 0.01 mg/L,Cl-in 0.01 mg/L,SO42-in 0.03 mg/L and C2O42-in 0.03 mg/L.The recovery is 90% ~ 110%.No pretreatment is required and no matrix interference exists in this method. |
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| Keywords: | ion chromatograph citric acid sodium citrate anions |
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