“…A number of analytical methods for MP and its related compounds have been developed: gas chromatography (GC) (Bruce and Maynard, 1969;Jasin et al, 1974;Terada et al, 1982Terada et al, , 1983Shimosato, 1988;Cox et al, 1Y8Y), gas-chromatography-mass spectrometry (GC-MS) (Morgan et al, 1972;Kamei et al, 1973;Yamamoto et al, 1981 ;Tnoue et al, 1983;Suzuki et al, 1984;Iwasaki et al, 1987), thin layer chromatography (TLC) (Hoof and Heyndrickx, 1974;Miyauchi, 197Y), polarization fluoroimmunoassay (Colbert et al, 1987;Eremin et al, 1987Eremin et al, , 1988, enzyme-or radioimmunoassay (Inayama et al, 1980;Niwaguchi et al, 1982;Aoki and Kuroiwa, 1983) and high performance liquid chromatography (HPLC) (Farrell and Jefferies, Author to whom correspondence should be addressed. 1983; Ishikawa et al, 1984;Takayama et al, 1984;Hayakawa et al, 1989Hayakawa et al, , 1990Nakashima et al, 1990aNakashima et al, , 1991aNakashima et al, , 1991b.…”