利用双重参比液直接测定啤酒中的甲醛

Determination of formaldehyde in beer by double-reference fluid

目的：探讨啤酒中甲醛测定方法。方法：用双重参比液测定啤酒中的甲醛。结果：该方法的线性范围在0～10μg/m l之间,回归方程Y=2.084×10^-2X-3.162×10^-3,相关系数r=0.9999。检出限0.057μg/ml,RSD1.09%～4.17%,加标回收率为92.64%～99.75%。结论：此方法操作简便,灵敏度高,结果可靠。

Objective：To develop a method for determination of formaldehy in beer.Methods：Using Double-Reference Fluid to measure formaldehyde in beer directly.Results：The limearity was obtained over the rang of 0～10 μg/ml.The regession equation was Y=2.084×10^-2X-3.162×10^-3.The correlation coefficient was r=0.999932.The limit of dection was 0.057 μg/ml,the relative standard deviation（RSD） was in the range of 1.71%～2.41%.The recovery was 93.8%～99.3%.Conclusion：The method is simple and sensitive to achieve satisfactory results.