建立了采用快速溶剂萃取-离子色谱同时测定塑料中三价铬和六价铬的方法.三价铬和六价铬分别以吡啶-2,6-二羧酸(PDCA)和1,5-二苯卡巴肼(DPC)作为络合剂在柱前和柱后进行衍生化,分别在紫外和可见波长下采用紫外检测器进行检测,灵敏度高,基体干扰小.本方法对三价铬和六价铬的检出限分别为5.0μg/L和0.5μg/L;分别在50～1000μg/L和5.0～100μg/L范围内呈现良好的线性关系,线性相关系数分别为0.9994和0.9998；三价铬和六价铬的回收率范围为90.7％～101.1％,相对标准偏差(RSD)为1.7％～4.4％.该方法分析速度快、灵敏度高、重现性好,可用于塑料中三价铬和六价铬的同时测定.
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