气相色谱/化学电离质谱法测定苹果中的比久
Determination of daminozide in apples by gas chromatography/chemical ionization mass spectrometry.
作者信息
Liu C H, Mattern G C, Singer G M, Rosen J D
机构信息
Rutgers University, Cook College, Department of Food Science, New Brunswick, NJ 08903.
出版信息
J Assoc Off Anal Chem. 1989 Nov-Dec;72(6):984-6.
A method using gas chromatography/chemical ionization mass spectrometry (GC/CIMS) for the determination of daminozide residues in apples has been developed. Daminozide was separated from the sample matrix by water extraction and cation exchange, converted to the methyl ester by treatment with HCl-methanol, and determined by GC/CIMS using succinonitrile as an internal standard. The detection level was 0.05 ppm. Recoveries were 92-104% from apples spiked at the 0.05-0.5 ppm levels. Of the 25 apple samples analyzed, only 2 were positive for daminozide (1.04 and 0.32 ppm).
已开发出一种使用气相色谱/化学电离质谱法（GC/CIMS）测定苹果中丁酰肼残留量的方法。通过水萃取和阳离子交换从样品基质中分离出丁酰肼，用盐酸 - 甲醇处理将其转化为甲酯，然后以丁二腈作为内标通过GC/CIMS进行测定。检测限为0.05 ppm。在添加了0.05 - 0.5 ppm水平丁酰肼的苹果中，回收率为92 - 104%。在分析的25个苹果样品中，只有2个样品的丁酰肼呈阳性（分别为1.04 ppm和0.32 ppm）。
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