作者：姚慧1, 刘立波2, 杨惠玲1
作者单位：1. 中国汽车技术研究中心, 天津 300300;
2. 庄信万丰(上海)化工有限公司, 上海 201613
关键词：颗粒捕集器;锶;钯;干扰;电感耦合等离子体质谱法
摘要：
部分颗粒捕集器中含有锶元素，会对钯元素的测定造成干扰，导致钯的测定结果偏高，采用HJ 509标准方法对105Pd监测会造成较大测量偏差。该文通过对大量颗粒捕集器样品的分析，找到锶与钯的影响关系：随着锶与钯浓度比例的增大，对钯的测定结果干扰影响越大。通过进行基体匹配、质量数选择和干扰消除等方法，最终找到采用电感耦合等离子体质谱法准确分析颗粒捕集器中钯的测定方法，可有效避免锶元素对钯元素测量干扰导致的测量偏差。
Effect of strontium on the test results of palladium in particulate filter
YAO Hui1, LIU Libo2, YANG Huiling1
1. China Automotive Technology and Research Center, Tianjin 300300, China;
2. Johnson Matthey(Shanghai) Chemicals Limited, Shanghai 201613, China
Abstract: Some particulate filters contain strontium element, which may interfere with the determination of palladium element, resulting in a high determination result of palladium. The method of HJ 509 standard may cause larger measurement deviation of 105Pd. Therefore, based on the analysis of particulate filter samples, it is found that with the increase of the concentration ratio of strontium to palladium, the interference effect on the determination of palladium is greater. Based on the methods such as matrix matching, mass number selection and interference elimination, the method of inductively coupled plasma mass spectrometry(ICP-MS) for the accurate determination of palladium in particulate filter is developed at last, which can effectively avoid the measurement deviation caused by the interference of strontium on palladium.
Keywords: particulate filter;strontium;palladium;interference;inductively coupled plasma mass spectrometry
2018, 44(2): 51-55 收稿日期: 2017-10-12;收到修改稿日期: 2017-11-02
基金项目:
作者简介: 姚慧(1984-),女,天津市人,工程师,硕士,主要从事车用催化剂贵金属检测研究工作。
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