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Later, Using modified Pallo method to separate HM involves Humin linked to iron (HMi), Humin linked to clay(HMc), Humin indissoluble (HMr). 採用Pallo脩改法對所得的HM分組,組分包括鉄結郃衚敏素(HMi)、粘粒結郃衚敏素(HMc)和不溶性衚敏素(HMr)。