Method for measuring organic selenium in tea

The invention discloses a method for measuring organic selenium in tea leaves, which comprises the following steps: measuring the total selenium content and inorganic selenium content in tea leaves, calculating the organic selenium content in the tea leaves by using a subtraction method, and measuring the total selenium content by adopting wet digestion treatment on the tea leaves, wherein the wetdigestion comprises the processes of adding mixed acid into the tea leaves, removing acid, carrying out first reduction, and adding 0.5-2.5 mL of hydrochloric acid to enable the constant volume acidity to be 15-35%. The method avoids the use of potassium ferricyanide, and has the beneficial effect of improving the accuracy of the detection result. 本发明公开了一种茶叶中有机硒的测定方法，包括：通过测定茶叶中的总硒含量和无机硒含量，利用差减法计算茶叶中有机硒的含量，总硒含量测定采用湿法消解处理茶叶，所述湿法消解包括在茶叶中加入混酸、赶酸、第一还原、加入0.5～2.5mL盐酸使定容酸度为15～35％的过程。本发明避免铁氰化钾的使用，具有提高检测结果准确性的有益效果。