Fast Concentration or Purity Check from a Single Drop

A liquid sample's concentration or purity needs a near-instant check from just a single small drop, without a lengthy analytical procedure.

References

• Kelly, S.M., Jess, T.J., Price, N.C. "How to Study Proteins by Circular Dichroism." Biochimica et Biophysica Acta 1751, no. 2 (2005): 119–139.