四极杆碰撞反应池-电感耦合等离子体质谱法测定粉条中的铝

Determination of aluminum element in starch noodles by inductively coupled plasma-mass spectrometry with quadruple collision cell technology

目的建立四极杆碰撞反应池-电感耦合等离子体质谱法测定粉条中铝元素的检测方法。方法样品经微波消解后使用电感耦合等离子体质谱仪进行检测,使用内标元素45Sc消除基体干扰和信号漂移,碰撞反应池(KED模式)消除质谱干扰。结果铝元素校正曲线相关系数为0.999783,方法检出限为0.045mg/kg,相对标准偏差为0.79%,加标回收率为88.4%~96.1%,粉丝粉条中铝成分分析标准物质检测结果在认定值范围内。结论该方法灵敏度高、准确性高、精密度好,适用于粉条中铝元素含量的检测。

Objective To establish a method for the determination of aluminum in vermicelli by inductively coupled plasma mass spectrometry with quadruple collision reaction cell. Methods After microwave digestion, the sample was detected by inductively coupled plasma mass spectrometry. Matrix interference and signal drift were eliminated by the internal standard element 45 Sc. Mass spectrum interference was eliminated by the collision reaction cell(KED mode). Results The correlation coefficient of aluminum correction curve was 0.999783. The limit of detection of the method was 0.045 mg/kg, the relative standard deviation was 0.79%, and the recovery rates ranged from 88.4% to 96.1%. The certified reference material of aluminum in starch noodles was in the range of certified value. Conclusion This method has high sensitivity, high accuracy and good precision, and is suitable for the determination of aluminum element content in powder strips.