EFFECT OF SURFACTANT SDS ON DETERMINATION OF NUCLEIC ACID WITH TERBIUM （III）FLUO

The effect of an anionic surfactant(sodium dodecylsulfate.SDS)on the fluorescence properties of nucleic acid with terbium(III)is studied.Results show that ri-bonucleir acid (RNA)presents fluorescence reaction with Tb(III)directly.but deoxyribonucleic acid(DNA)pre-sents similar fluorescence reaction only after its denatura-tion.In the presence of SDS ,the fluorescence intensity is 4.0 times and 3.5 times greater than that of DNA and RNA without SDS.