The alkylphenols (AP) as the target analyte, with 1:1 (V / V) aqueous solution of methanol, adjusting pH = 2 ~ 3, after centrifugation through C18 solid phase extraction column, eluting with hexane to...
To alkylphenols (AP) for the target analyte, with 1:1 (V / V) aqueous methanol solution, adjust pH = 2 ~ 3, after centrifugation through C18 SPE column, eluting with hexane to remove the water layer, ...