  Urea and creatinine are two important diagnostic components of urine. The
study of creatinine in liquid phase is difficult due to its feeble
concentration in urine. To bring down the detection limit, Raman spectroscopy
of dried urine samples was employed. Raman studies in association with partial
least square algorithm of artificial urine samples gave improved results in
dried phase as compared to liquid phase. These findings were further validated
on real urine samples.
