Patent ID: 6166807
Filing Date: 2000-12-26
Classification: G01J,G01N

Abstract:
A method of urinalysis in which a concentration of an optically active substance in urine is determined, the method comprising the steps ofmeasuring an angle of rotation of said urine, wherein the angle of rotation is measured in the urine containing a substance to be measured having an optical rotary power and an optically active substance of a known concentration; anddetermining the range of concentration C (kg/dl) of said substance to be measured using the following equation:(A-A.sub.h)/(.alpha..times.L)<C<(A-A.sub.1)/(.alpha..times.L)A.sub.h =L.times.a.times.C.sub.hA.sub.1 =L.times.a.times.C.sub.1whereA.sub.h : angle of rotation (degree) of urine measured measured at a maximum value (kg/dl) of concentration of optically active substance of a known concentration,A.sub.l : angle of rotation (degree) of urine measured measured at a minimum value (kg/dl) of concentration of optically active substance of a known concentration,C.sub.h : maximum value (kg/dl) of concentration of optically active substance of a known concentration,C.sub.1 : minimum value (kg/dl) of concentration of optically active substance of a known concentration,.alpha.: specific angle of rotation (degree/cm.multidot.dl/kg) of a substance to be measured,a: specific angle (degree/cm.multidot.dl/kg) of rotation of optically active substance of a known concentration,andL: measurement light path length (cm).