以离子对试剂作流动相,采用离子对抑制电导检测法同时测定植物中残留的矮壮素和缩节胺.简单处理后的样品经过Dionex IonPac NG1保护柱和NS1分离柱,在流速为1.00 mL/min、淋洗液为1.00 mmol/L九氟戊酸(作为离子对试剂)-7%(体积分数,下同)乙腈时等度洗脱分离,能够快速稳定出峰,且被测物与其他干扰离子充分分离.矮壮素和缩节胺的检出限分别为0.154 6和0.171 4 mg/L,在1～100 mg/L范围内具有良好的线性关系和重现性.对实际样品进行测定,矮壮素和缩节胺的回收率范围分别为96.06%～104.6%和98.53%～103.7%,相对标准偏差小于3%.该方法分析结果令人满意,可以满足矮壮素和缩节胺常规的定性、定量分析需求.
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