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A proficiency test scheme for the quality control of black tea and development of quality control material for internal quality control
Baltaci, Cemalettin; Ilyasoglu, Huri; Sarikaya, Sevim Beyza Ozturk; Cavrar, Sevda; Yayli, Nurettin (Springer, 2011)A proficiency test (PT) was organized for quality control analysis of black tea. Test materials for the analyses of total content of powder tea, moisture, total ash, acid-insoluble ash, water-soluble ash, alkalinity of ...
