00371nam a22001097a 4500100002300000245011600023260004900139300000900188650001600197650002400213650002400237  aWickramasinghe,M.S  aDetermination of the Mass percentages of Anionic Surfactants in hand washes by developing a Colorimetric method  aColombobInstitute of Chemistry Ceylonc2011  a64 p  asurfactants  aAnionic surfactants  acolorimetric method