Thank you for your inquiry. A final concentration of 1 uM means you have 1 μmole or 14.34 ug per L. Concentrations should be confirmed with OD readings of the final solution. Please remember, the extinction coefficient and molecular weight reported is calculated average and the final values of a randomer oligonucleotide may vary.
We’re happy to discuss how to measure the concentration of you solution. Please email us to discuss measuring the absorbance.