利用手持式色度计测定果茶中含糖量

Measurement of Sugar Content in Fruit Tea Using a Handheld Colorimeter

为进一步探究手持式传感器在中学化学教学中的应用,采用蒽酮-硫酸法,在中学实验条件下,对市场上常见的5种品牌果茶进行了含糖量的测定。结果显示,果茶中的实际含糖量与品牌所标糖度存在一定出入;同时,一杯容量为500 mL的果茶中的含糖量即超过《中国居民膳食指南》建议的人均每日摄糖量25 g的标准。本研究所采用的方法具有仪器简单、实验试剂易得、操作简便且快速、检出限低等特点,适合在中学化学教学活动中开展,具有较高的实际应用价值。

In order to further explore the application of handheld sensors in high school chemistry teaching,the anthrone-sulfuric acid colorimetric method was used to quantitatively determine the sugar content of five popular brands of fruit tea under middle school experimental conditions.The results show that the actual sugar content of fruit tea drinks differs from the sugar level marked by the brands.At the same time,the sugar content of a cup of fruit tea with a capacity of 500mL exceeds the standard of 25g per person per day recommended by the Dietary Guidelines for Chinese Residents.The method uses simple instruments and reagents,is easy and fast to operate,has a low detection limit,and is suitable to be carried out in high school chemistry teaching which has high practical application value.