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本文对离子色谱法的分离、检测、不同样品的处理和测定氟进行了综述。认为离子色谱法是测定氟的有效方法。氟是环境化学和生命科学研究中常见的元素。与其它测定方法相比,离子色谱法测定氟具有灵敏度较高,测速较快,较准确和能作形态分析等优点。 1975年,Small等首先用离子色谱法测定氟,此后有了商品化仪器,有关文献也与日俱增。本文就氟的分离、检测、样品处理几个方面进行讨论。 1 分离1.1 离子交换分离离子交换是离子色谱最通用的分离方法,测定氟时采用阴离子交换树脂(低交换容量的季铵盐型)。若用抑制电导检测,则采用低浓度的碱性淋洗液,如NaHCO_3-Na_2CO_3、Na_4BO_4、NaOH、NaHCO_3等,也有采用两性离子如氨基酸等淋洗。对单柱型离子色谱,以苯甲酸或苯二酸及其盐淋洗为佳。
In this paper, the separation and detection of ion chromatography, the treatment of different samples and the determination of fluorine were reviewed. Ion chromatography is considered an effective method for the determination of fluorine. Fluoride is a common element in environmental chemistry and life science research. Compared with other determination methods, the determination of fluorine by ion chromatography has the advantages of higher sensitivity, faster speed, more accurate and can make morphological analysis. In 1975, Small et al. First determined fluorine by ion chromatography, and since then has commercialized instruments, and the literature is also on the rise. This article discusses the separation of fluorine, detection, sample processing several aspects. 1 separation 1.1 Ion Exchange Separation Ion exchange is the most common ion chromatography separation method, the determination of fluoride anion exchange resin (low exchange capacity of the quaternary ammonium type). If the inhibition of conductivity detection, the use of low concentrations of alkaline eluent, such as NaHCO_3-Na_2CO_3, Na_4BO_4, NaOH, NaHCO_3, etc., but also with amphoteric ions such as amino acids leaching. For single column ion chromatography, benzoic acid or phthalic acid and its salt rinse better.