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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, Many thanks! 2014-02-28 12:20:11

3 Standard addition method

To each of each of three 25ml headspace vials, add 5.0ml of city tap water respectively, then

add 1.0μl, 2.0μl and 3.0μl of bromodichloromethane sample at the concentrations of

77.72μg/ml and dibromochloromethane sample at the concentrations of

98.24μg/ml separately, cap plugs immediately, mix well manually, allow to stand at a

constant temperature of 15℃ for 5min, inject 100μl of headspace gas with a vapor-

tight syringe, record the chromatograms.

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