Safety Quality of Compressed White Tea

In order to prove quality and safety of compressed white tea，the main quality safety indexes of compressed white tea with different years and colors were determined by national standard method and evaluated.Results showed that no pathogenic bacteria was found in compressed white tea with different years and colors，and mould was found in 1 sample.Pesticide residues meet GB2763-2016 food pollutant limit requirements.Heavy metal detection results were that Pb content was 0.229-0.819 mg/kg，As content was 0.071-0.205 mg/kg，Cd content was 0.006-0.036 mg/kg，Cr content was 0.111-6.522 mg/kg，Cu content was 9.892-23.399 mg/kg，Al content was 126.717-668.417 mg/kg，Hg content was 0-0.024 mg/kg.The results of heavy metal detection met requirements of pollutant limits in food.Results showed that water content was 4.6%-10.5%，ash content was 4.6%-5.7%，the water extract content was 30.2%-40.1%，and the tea stalk content was 0.8%-4.5% by physical and chemical testing.Quality of compressed white tea was safe and reliable.