一次性餐盒材料中全氟辛酸和全氟辛烷磺酸沥出性研究
ANALYSIS OF LEACHABLE PERFLUOROOCTANIC ACID AND PERFLUOROOCTANIC SULFONIC IN DISPOSABLE LUNCH BOXES
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摘要: 利用高效液相色谱-串联质谱检测方法对一次性餐盒材料中可沥出性全氟辛酸(PFOA)和全氟辛烷磺酸(PFOS)进行了研究.分别选取水、3%乙酸(W/W)、15%乙醇(V/V)和正己烷4种浸取液模拟餐盒材料在使用过程中可能接触到的水性、酸性、酒精类和油脂类条件.材料经4种溶液浸提后,浸取液用固相萃取净化和浓缩,目标分析物PFOA和PFOS采用内标法进行定量.研究表明,一次性餐盒材料在模拟条件下中有以PFOA为主的全氟类化合物从材料中沥出,其中酸性环境对PFOA的浸取率最高(2296ng·m-2),为其它3种方法的82.8倍;4种浸提条件下PFOS的沥出率都比较低,浓度仅为0.7ng·m-2—5.4ng·m-2.Abstract: The leachability of perfluorooctanic acid(PFOA)and perfluorooctanic sulfonic(PFOS)from disposable lunch boxes materials under 4 food stimulant conditions was investigated with the HPLC/MS/MS method,using MPFOA and MPFOS as the internal standard,respectively.Four kinds of solvents were selected to simulate the exposure of food to the plastic materials,which were distilled water,3% acetic acid(W/W),15% ethanol(V/V)and n-hexane.The two compounds in the stimulant solvents were extracted using the Supelclean LC-18 SPE(3cc)cartridges.It was indicated that foodstuff can be very likely contaminated by perfluorinated compounds during the usage of disposable lunch boxes,and that much higher level of PFOA(about 2296 ng·m-2)was detected in the stimulant solvent of 3% acetic acid after contact with the disposable lunch box for 4 h.Generally,PFOS can hardly be leached out under the four conditions.
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Key words:
- perfluorooctanic acid /
- perfluorooctanic sulfonic /
- disposable lunch box /
- leachablity
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