离子色谱法检测福鼎白茶白露茶茶水中的7种阴离子成分

Determination of seven anions in Fuding white tea white dew tea by ion chromatography

中文关键词:  白露茶  阴离子  温度  离子色谱法

英文关键词:white dew tea  anion  temperature  ion chromatography

中文摘要:

      目的 检测福鼎白茶白露茶茶水中7种阴离子含量。方法 25、80、100 ℃下, 用50 mL超纯水浸泡30份1 g样品(料水比为1:50)5 min, 通过离子色谱法对7种阴离子进行测定分析。结果 30份样品茶水的阴离子含量均较低, 25 ℃浸泡的茶水中, 除溴离子未检出, 其余6种离子浓度均显著低于80 ℃和100 ℃(P<0.05), 100 ℃浸泡的茶水的氯离子、亚硝酸根离子、磷酸二氢根离子和硫酸根离子浓度均显著高于80 ℃(P<0.05)。结论 离子色谱法检测茶水中的7种阴离子方法可靠。

英文摘要:

      Objective To detect the content of 7 kinds of anions in Fuding white tea and white dew tea. Methods At 25 ℃, 80 ℃ and 100 ℃, 30 samples of 1 g were soaked in 50 mL ultrapure water (the ratio of material to water was 1:50) for 5 min. Seven anions were determined and analyzed by ion chromatography. Results The content of anions in 30 samples of tea was low. The concentration of the other 6 ions in the tea soaked at 25 ℃ was significantly lower than that in 80 ℃ and 100 ℃ (P<0.05), except for bromine ions. The concentration of chloride ions, nitrite ions, dihydrogen phosphate ions and sulfate ions in the tea soaked at 100 ℃ was significantly higher than that in the tea soaked at 80 ℃ (P<0.05). Conclusion The method of detecting 7 kinds of anions in tea by ion chromatography is reliable.