RNA提取纯化试剂

Spectrophotometric Analysis of rRNA

SpectrophotometricAnalysisofrRNA

LEVELI

Materials

  • RNA
  • UVspectrophotometerandcuvettes
  • Alkalinedistilledwater

Procedure

  1. Dissolve10mgofcommercialRNAin250ml.ofslightlyalkalinedistilledwater.Useavolumetricflaskandproperanalyticaltechnique.Thiswillgiveastandardsolutionof40microgramsRNA/ml.

  2. Prepareaseriesofdilutionssothatyouhave40,20,10,5and2.5microgramsofRNAperml.

  3. TurnonaUVspectrophotometerandadjustthewavelengthto260nm.Usethealkalinewatertoblankthespectrophotometerat260nm.

  4. ReadtheA_2_6_0ofeachofthestandards.PlottheA_2_6_0vstheconcentrationofRNAandcalculatetheextinctioncoefficient.

  5. Dissolveyourisolated,precipitatedRNAin10.0mlofalkalinewater.Prepareaserialdilutionfor1/10,1/100,1/1000and1/10000.Measuretheabsorbanceofeachat260nmand,usingthedilutionwhichgivesareADIngbetween.1and1.5absorbanceunits,computetheconcentrationofRNAinyoursample.
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