Yuji Yamauchi

Quasi-flow injection analysis for rapid determination of caffeine in tea using the sample pre-treatment method with a cartridge column filled with polyvinylpolypyrrolidone.

T. Tanimoto, Iho Kohno, Kirara Hatanaka, 2008, Journal of chromatography. A.

Simple and rapid UV spectrophotometry of caffeine in tea coupled with sample pre-treatment using a cartridge column filled with polyvinylpolypyrrolidone (PVPP).

T. Tanimoto, Iho Kohno, Kirara Hatanaka, 2008, Chemical & pharmaceutical bulletin.

Improved sample pre-treatment for determination of caffeine in tea using a cartridge filled with polyvinylpolypyrroridone (PVPP).

T. Tanimoto, Iho Kohno, Kirara Hatanaka, 2007, Chemical and pharmaceutical bulletin.