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50mL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。
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.
作者
杨华飞越
韩景辉
左娟
张喆
李超
李斌
安康
YANG Hua-Fei-Yue;HAN Jing-Hui;ZUO Juan;ZHANG Zhe;LI Chao;LI Bin;AN Kang(School of Public Health,Shandong First Medical University&Shandong Academy of Medical Sciences,Taian 271016,China)
出处
《食品安全质量检测学报》
CAS
2020年第13期4354-4357,共4页
Journal of Food Safety and Quality
基金
山东省自然科学基金项目(ZR2019MH107)
山东第一医科大学大学生科研计划课题(201901006)。
关键词
白露茶
阴离子
温度
离子色谱法
white dew tea
anion
temperature
ion chromatography
