啤酒浊度的测定方法研究

Development of a Quick Analytical Method for Determining Beer Turbidity

为建立留样检测啤酒浊度的方法模型。使用Haffmans VOS Rota 90/25型啤酒浊仪提供的双滤光片采用90°和25°双波长检测浊度值,与传统检测方法进行比较。结果表明,同一波长处两种检测方法无显著性差异(P>0.05);在不同检测波长处,检测结果不同;采用红色滤光片仅能消除棕色瓶的影响因素,对绿色啤酒瓶有一定的影响;而采用绿色滤光片和无滤光片情况下,型号各异的啤酒瓶对检测结果无明显影响。结果表明,留样检测啤酒浊度方法成立,但选用波长对检测精度存在影响。

No legal detection wavelength has been published in the current national standard involving the measurement of beer turbidity.Different measurement results for the same beer samples are always given.This not only brings trouble to beer manufacturers,but also makes it difficult to ensure beer quality.In the present study,a quick method for directly determining the turbidity of bottle contained beer without opening was presented.Turbidity was measured with Haffmans VOS Rota 90/25 type double-filter beer turbidity analyzer at both 90°and 25°,and the measurements results were compared with those obtained by the conventional method.There was no significant difference between both methods at the same wavelengths（P 0.05） and different results,however,were obtained at different wavelengths.The use of red filter could only eliminate the intervention from brown color of bottles,but made the determination of green bottles inaccurate.When green filter or no filter was used,the results of determining different size bottles were not significantly different.As a conclusion,the presented analytical method is valid.Nevertheless,the selection of detection wavelength influences determination accuracy.