| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1248236 | TrAC Trends in Analytical Chemistry | 2012 | 9 Pages |
Abstract
⺠A proficiency test (PT) of Al, Ca, Fe, K, P, and Zn in tea leaf powder. ⺠The certified values of NMIJ CRM 7505-a were used as reference values. ⺠The validity of the reference values was confirmed by inter-laboratory comparison. ⺠The z-scores and the δ-scores were calculated to assess the reported results. ⺠The possible reasons for questionable or unsatisfactory results were summarized.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Yanbei Zhu, Takayoshi Kuroiwa, Tomohiro Narukawa, Kazumi Inagaki, Koichi Chiba,