1. 换算说明:1ppm=1000ppb;1ppb=1000pptppm:mg/L(毫克/升)ppb:ug/L(微克/升)ppt:ng/L(纳克/升)2. 换算说明:1M=103mM=106μM=109nM=1012pM=1015fMM:即mol/LmM:即mmol/LuM:即umol/LnM:即nmol/LpM:即pmol/LfM:即fmol/L===