Abstract: Objective:TounderstandthepHvaluesandcontentsofformaldehyde,Pb,CdandMninsomecommerciallyavailable detergent. Methods: Thecontentsofformaldehyde,Pb,CdandMnandpHvaluesinthedetergentweredetectedbyUV-visible spectrophotometry,pHmetermethodandflameatomicspectrophotometry. Results:Formaldehydewasdetectedin26samples（bulk samples and hardcover samples）with a detection range of 0.004-0.076 mg/g. The differences of formaldehyde contents were statisticallysignificant（ t=2.745, P=0.018<0.05）.Pbwasdetectedinneitherbulksamplesnorhardcovers,Cdwasdetectedin13 samples（5bulksamplesand8hardcoversamples）,andMnwasdetectedin2bulks.ThepHofthesamplesweredetectedwitha rangeof5.7to10.5. Conclusion: ThepHvaluesandthecontentsofformaldehyde,Pb,CdandMninthe 26sampleswerein accordancewiththenationalstandard.However,thereweredifferentcontentsindifferentpackages.Therefore,consumersshould syntheticallyconsiderwhentheypurchasedetergents.

Key words: detergent, formaldehyde, pHvalue, heavymetals, detectionandanalysis