我国市售酱油氯丙醇污染研究:地区间污染水平的比较

采用稳定性同位素稀释气相质谱法定量测定多组分氯丙醇,调查了我国市售酱油氯丙醇的污染水平。调查分3次进行,所抽查的629份市售酱油产于2003~2004年间,来自我国11个省、市。各地区样品3-氯-1,2-丙二醇(3-MCPD)的检出率均较高,在90%~100%之间,3-MCPD水平在0.003~189 mg/kg之间,几何均数为21.1μg/kg;2-氯-1,3-丙二醇(2-MCPD)的检出率在14.3%~83.8%之间;1,3-二氯-2-丙醇(1,3-DCP)、2,3-二氯-1-丙醇(2,3-DCP)的检出率分别在0%~24%、0~18.9%之间,全部样品的几何均数低于定量限。总体上,我国市售酱油氯丙醇污染水平有明显下降,但以各地有限的抽查样品评价,污染的地区差异明显,来自河南、广西、浙江样品污染水平以及检出率相对较高,而福建、江苏、北京以及上海样品污染水平较低。

Occurrence of Chloropropanols in Soy Sauce in Retailer in China:Comparison of the Levels of Chloropropanols of Soy Sauce from the Various Origins

Three surveys were carried out to investigate the contamination of chloropropanols of the soy sauce products in retail business in China.The stable isotope dilution technique coupled with gas chromatography-mass spectrometer was used.Quantitative 3-monochloropropane-1,2-diol(3-MCPD) was found in 90% to 100% of the samples available in various origins.It varied from above the limit of quantification(> 3.0μg/kg) to 189mg/kg.2-Monochloropropane-1,2-diol(2-MCPD) was detected in a range between 14.3% and 83.8% of the samples.1,3-dichloro-2-propanol(1,3-DCP) and 2,3-dichloro-1-propanol(2,3-DCP) were detected in the ranges of 0~24% and 0~18.9% of the samples,respectively.Great improvements have been made for china to decrease contamination of chloropropanols in soy sauce.Despite the limited amount of the soy sauce samples from the certain origins,occurrence of soy sauce from Henan,Guangxi and Zhejiang province was relatively more serious than that from the other origins.And occurrence of soy sauce samples from Fujian,Jiangsu,Beijing and Shanghai was relatively preferable.