样品预处理对离子色谱法测定钢铁腐蚀产物中水溶性阴离子含量的影响

The Influence of Sample Pretreatment on the Determination of Water-Soluble Anion Content in Steel Corrosion Products by Ion Chromatography

摘要: 离子色谱法作为一种高效的分析技术，在测定钢铁腐蚀产物中水溶性阴离子含量方面具有重要作用，但是在日常测试过程中较少关注样品前处理等因素对测定结果的影响。传统的样品前处理只采用了加热溶解，但是测试过程中发现有的样品仅靠加热溶解其分散性、溶解性并不好，影响结果的测定。所以本文在传统加热溶解的基础上重点研究了超声方法和高速离心机的影响，实验表明，样品超声有利于提高样品的溶解性，并且超声时间在(1~3 min)时，对于测定的结果较稳定。同时采用离心机处理利于我们提取上层清液，从而保护色谱柱不被损坏，确保测定结果的准确性。

Abstract: As an efficient analytical technique, ion chromatography plays an important role in determining the content of water-soluble anions in steel corrosion products. However, in daily testing processes, less attention is paid to the influence of factors such as sample pretreatment on the determination results. Traditional sample pretreatment only uses heating and dissolution. However, during the testing process, it is found that for some samples, only relying on heating and dissolution, their dispersibility and solubility are not good, affecting the determination of results. Therefore, on the basis of traditional heating and dissolution, this paper focuses on studying the influence of ultrasonic methods and high-speed centrifuges. Experiments show that ultrasonic treatment of samples is beneficial to improving the solubility of samples. And when the ultrasonic time is (1~3 minutes), the determination results are relatively stable. At the same time, using a centrifuge for treatment is beneficial for us to extract the supernatant, thereby protecting the chromatographic column from being damaged and ensuring the accuracy of the determination results.