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jackchen129至尊木蟲(chóng) (職業(yè)作家)
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[交流]
【求助】關(guān)于FDA規(guī)定
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以下是FDA規(guī)定里關(guān)于二氧化氯的一句話: “The additive may be used as an antimicrobial agent in water used to wash fruits and vegetables that are not raw agricultural commodities in an amount not to exceed 3 ppm residual chlorine dioxide as determined by Method 4500-ClO2E." 這句話是說(shuō)在清洗果蔬時(shí)二氧化氯最高使用濃度不能超過(guò)3 ppm,還是在清洗果蔬后用Method 4500-ClO2E方法測(cè)定的每千克果蔬樣品中不能超過(guò)3mg二氧化氯物質(zhì)? 另外,Method 4500-ClO2E(應(yīng)該就是五步碘量法吧)方法中說(shuō)到“this procedure can be applied to concentrated solutions (100-100 mg/l) or dilute solutions (0.1-10 mg/l) by appropriate selection of titrant concentration and sample size”。那么這里的0.1 mg/l是該方法的檢測(cè)限嗎? 謝謝。! |
找到一些相關(guān)的精華帖子,希望有用哦~
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