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Autor:
Hisao Oka, Junko Hayakawa, Eiichi Mikami, Yoshitomo Ikai, Tsutomu Ohno, Yuko Ito, Toshihisa Nakagawa
Publikováno v:
Eisei kagaku. 42:53-59
A simple and rapid analysis of coal tar dyes in cosmetics and foods was established using reversed phase TLC/scanning densitometry. Forty-five kinds of coal tar dyes were able to be separated completely on reversed phase TLC plates by the complementa
Publikováno v:
Eisei kagaku. 14:24-29
It was found that the sodium salicylic acid method is more excellent in point of reproducibility and simplicity than the other methods for the determination of nitrate nitrogen in water. Furthermore, the authors improved the precise conditions of pro