Kawasaki Yoko, Yomota Chikako, Tanamoto Kenichi
Kokuritsu Iyakuhin Shokuhin Eisei Kenkyusho Hokoku. 2003(121):48-50.
A rapid and simple method was developed for simultaneous determination of methyl, ethyl, isopropyl, npropyl, isobuthyl and n-buthyl p-hydroxybenzoic acid esters (PHBA-Es) in laver by HPLC. Six PHBA-Es were extracted from laver with n-hexane-ethyl acetate (1:1) by shaking. The extract was evaporated. The residue was dissolved in methyl alcohol and determined by HPLC. Recoveries of six PHBA-Es spiked in laver were 93.6-101.2% at the level of 2 micrograms/g.
