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利用比重法测定酒精度数的酒精比重计可用于准确测定含水酒精液(即主要含有水及酒精两种成分)的酒精含量,对含有药物的酒剂、食用白酒及含有杂质的酒精等,由于这些物质中不仅含有酒精及水,还含有其它物质,因此酒精比重计就不适合上述物质中酒精度数的测定。实际工作中,我们通过变换普通万用电表电阻档,就可以大约测定上述液体物质中的酒精含量。现介绍如下。具体方法为测定时先用一小木块及几个橡皮筋,将万用表的两只表
The alcohol hydrometer for determining the alcohol level by the specific gravimetric method can be used to accurately determine the alcohol content of aqueous alcohol solution (that is, it mainly contains two components of water and alcohol), and for alcoholic drinks, edible liquor and impurities containing alcohol, etc., Substance not only contains alcohol and water, but also contains other substances, so the alcohol hydrometer is not suitable for the determination of alcohol content in the above substances. In actual work, we can determine the alcohol content of the liquid substance by changing the resistance of the ordinary multimeter. Now introduced as follows. The specific method for the determination of a small wooden block and a few rubber bands, the two tables of the multimeter