离子色谱法监控工业一氯乙酸钠产品的质量.pdf

石油化
210
PETROCHEMICAL TECHNOLOGY
2012年第41卷第2期
离子色谱法监控工业一氯乙酸钠产品的质量
杨一青,李慧琴,李应成,沙鸡,沈之芹,张卫东
(中国石化上海石油化工研究院,上海201208)
摘要]采用离子色谱法分析了工业一氯乙酸钠产品的组成,建立了T业一氯乙酸钠的质量监测方法,选择了合适的分析条件。
实验结果表明,工业一氯乙酸钠产品中除含有一氯乙酸钠外,还含有氯化钠、乙醇酸钠和二氯乙酸钠等物质;一次进样可同时
监控这4种组分,同时分别建立了这4种组分的标准工作曲线,线性相关系数均大于0.99,氯化钠、乙醇酸钠、二氯乙酸钠的理
论检出下限分別为2.0,36,9.2gL;以KOHI溶液为淋洗液,在淋洗液流量1.00mL/min、KOH溶液初始浓度13.6moML的梯度
淋洗条件下,4种组分的回收率为994%~110.3%,相对标准偏差为0.738%~4.71%。该方法具有灵敏、准确、简便和省时等
优点。エ业一氯乙酸钠产品长期储存于潮湿及较高温度下会変质,建议购买的工业一氯乙酸钠应尽快使用或存储于密封荫凉的
地方.
关键词」一氯乙酸钠;氯化钠;乙醇酸钠;二氯乙酸钠;离子色谱法
文章编号]1000~8144(2012)02-0210-05
中图分类号]TQ420.4
文献标识码]」A
Quality Control of Industrial Sodium Monochloroacetate by Ion Chromatography
Yang Yiqing, Li Huiqin, Li Yingcheng, Sha Ou, Shen Zhigin, Zhang Weidong
(SINOPEC Shanghai Research Institute of Petrochemical Technology, Shanghai 201208, China
Abstract J The composition of industrial sodium monochloroacetate was analyzed by ion
chromatography, an industrial sodium monochloroacetate quality monitoring method was
established and the analysis conditions were optimized. It was revealed that the industrial sodium
monochloroacetate contained sodium chloride, sodium glycollate and sodium dichloroacetate. A single
sample injection could simultaneously detect the four components quantitatively. Four linear calibration
curves were obtained with all the correlation coefficients more than 0.999, and the theoretical
detection limits of sodium chloride, sodium glycollate and sodium dichloroacetate were 2.0, 3.6 and
9.2 wg/L, respectively, The average recovery reached 99. 4%-110.3%, and the relative standard
deviations of the four components were in the range of 0.738%-4.711% under the gradient elution
conditions of KOH eachate flowrate 1.00 ml/min and the initial KOH concentration 13.6 mmol/L. The
result of quality controlling for the industrial sodium monochloroacetate showed that it should not be
stored at high temperature and in wet environment
Keywords od moncrctae; od m clide; soium glycollate; sodium dichloroacetate
ion chromatography
氯乙酸钠是生产表面活性剂的原料13,而行监控4,但化学分析法不仅耗时、误差大
工业一氯乙酸钠产品常含有氯化钠、氢氧化物
而且测定结果偏高。
氯乙酸钠和水等杂质,其中水会影响一氯乙酸
钠的反应活性,同时与二氯乙酸钠反应生成相对
分子质量高的副产物,工业一氯乙酸钠产品的
收稿日期]2011-08-12;[修改稿日期]2011-10-24。
L作者简介」杨一青(1963-),女,浙江省绍兴市人,硕士,高
质量好坏直接影响由其合成的产品质量,因此级工程师,电话02168462197612,电邮yman
工业一氯乙酸钠产品出厂时常用化学分析法进 com.cn