CAJ | 학술논문

采用液相微萃取/气相色谱-质谱联用测定食品中的四种防腐剂和三种抗氧化剂.优化后的萃取条件为:2.0 μL甲苯作萃取剂,微液滴在样品中深度为0.85 cm,搅拌速度800 r/min,萃取时间25 min,溶液的pH=3,加入盐的质量浓度为10%.该方法线性范围为0.5～400 mg/kg,检出限0.01～1.2 mg/kg,加标回收率93.7%～113.4%,相对标准偏差2.7%～8.6%.
채용액상미췌취/기상색보-질보련용측정식품중적사충방부제화삼충항양화제.우화후적췌취조건위:2.0 μL갑분작췌취제,미액적재양품중심도위0.85 cm,교반속도800 r/min,췌취시간25 min,용액적pH=3,가입염적질량농도위10%.해방법선성범위위0.5～400 mg/kg,검출한0.01～1.2 mg/kg,가표회수솔93.7%～113.4%,상대표준편차2.7%～8.6%.
A liquid-phase microextraction (LPME) method was developed for the determination of four preservatives and three antioxidants in food by gas chromatography-ion trap mass spectrometry(GC-IT/MS). The optimal LPME conditions, 2.0 μL of toluene, 0.85 cm of the depth of microdrop, 800 r/min of stirring rate, 25 min of extraction time, 10% salt and pH=3 were obtained. The conditions were used for analysis of preservatives and antioxidants in foods. The analytical results showed that the working curves for 7 preservatives and antioxidants were linear in the range of 0.5～400 mg/kg by GC-MS on selective ion storage mode. The detection limits were between 0.01 mg/kg and 1.2 μg/kg, and the overall recoveries were 93.7% to 113.4% with the relative standard deviations of 2.7%～8.6%.