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| Investigation on Determination of Migration of Five Fluorescent Whitening Agents in Food Processing Machinery Material Sealing Rubber Washer and Their Migration Law |
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| DOI： |
| KeyWord:sealing rubber washer fluorescent whitening agents high performance liquid chromatography－tandem mass spectrometry（UPLC－MS/MS） food simulants migration law |
| Author | Institution |
| HOU De-li，XU Li，LIANG Zhen-gang，DAI Xiao-li，WU Yu-lang |
Technology Center of Haikou Customs，Haikou ，China |
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| Abstract: |
| An high performace liquid chromatography－tandem mass spectrometric method was established for determination of the specific migration of five fluorescent whitening agents，i.e FWA184，FWA185，FWA393，FWA367 and FWA135 in food processing machinery material sealing rubber washer．The migration law for 5 fluorescent whitening agents transferring from food processing machinery material sealing rubber washer into 4 food simulants（water，4% acetic acid，50% ethanol and olive oil） was investigated．The results showed that there were good linear relationships for five fluorescent whitening agents in the concentration range of 5－100 μg/L，with their correlation coefficients（r） not less than 0.999 1．The limits of quantitation（LOQ） of the method were 0.001－0.050 mg/kg．In olive oil，the average recoveries at three spiked levels of 0.05，0.1， 0.5 mg/kg ranged from 81.8%－101%，with relative standard deviations（RSDs，n＝10） of 1.2%－5.6%. As proved，this method was simple and fast，which satisfies the requirements（including sensitivity，specificity and selectivity） for determining fluorescent whitening agents in food processing machinery material sealing rubber washer．Under the same conditions，the migration of 5 fluorescent whitening agents in sealing rubber washer was the highest in olive oil．With the increase of temperature，the migration of 5 fluorescent whitening agents increased significantly，while with the extension of contact time，the migration of 5 fluorescent whitening agents showed a process from rapid migration to slow migration，and then tended to reach an equilibrium． |
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