This standard specifies the analysis methods for various health indicators in various types of tea such as green tea, black tea, and pressed tea. This standard is applicable to the analysis of various hygienic indicators in various types of tea such as green tea, black tea, and pressed tea.
GB/T 5009.57-2003 history
2003GB/T 5009.57-2003 Method for analysis of hygienic standard of tea
1996GB/T 5009.57-1996 Analytical method for hygienic standard of tea