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jiangguofeng

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专业: 合成药物化学

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zb6824785: 金币+20, 翻译EPI+1, ★★★★★最佳答案, Thank you very very much! 2014-02-28 12:24:21

2 Various gas-liquid phase ratio method

To each of three 25ml headspace vials, add respectively 1.0ml, 2.0 and 5.0ml of synthetical water sample

containing 0.357mg/L benzene, allow to stand at 23℃ for 60min, inject 300μl of

headspace gas with a vapor-tight syringe, record the chromatograms. Add 1.0μl of

357mg/L benzene/methanol sample to a 25ml headspace vial containing 0.20ml of

water, cap plug immediately, allow to stand at 23℃ for 60min, inject 300μl of the gas, record the chromatograms.

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