Method of urinalysis, urinalysis apparatus, method of measuring angle of rotation and polarimeter
First Claim
1. 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;
space="preserve" listing-type="equation">(A-A.sub.h)/(α
×
L)<
C<
(A-A.sub.1)/(α
×
L)
space="preserve" listing-type="equation">A.sub.h =L×
a×
C.sub.h
space="preserve" listing-type="equation">A.sub.1 =L×
a×
C.sub.1whereAh ;
angle of rotation (degree) of urine measured measured at a maximum value (kg/dl) of concentration of optically active substance of a known concentration,Al ;
angle of rotation (degree) of urine measured measured at a minimum value (kg/dl) of concentration of optically active substance of a known concentration,Ch ;
maximum value (kg/dl) of concentration of optically active substance of a known concentration,C1 ;
minimum value (kg/dl) of concentration of optically active substance of a known concentration,α
;
specific angle of rotation (degree/cm·
dl/kg) of a substance to be measured,a;
specific angle (degree/cm·
dl/kg) of rotation of optically active substance of a known concentration,andL;
measurement light path length (cm).
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Accused Products
Abstract
The present invention provides a urinalysis apparatus easy to maintain and manage without using any supplies such as the test paper, in which the concentration of an optically active substance in urine is determined by measuring the angle of rotation of the urine. Also, a polarimeter and a urinalysis apparatus which are reliable, compact and inexpensive are provided by using a polarimeter including means for transmitting the polarized light through a specimen, applying a magnetic field to the specimen and detecting the change in the direction of light polarization due to the application of the magnetic field.
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Citations
5 Claims
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1. A method of urinalysis in which a concentration of an optically active substance in urine is determined, the method comprising the steps of
measuring 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; - and
determining the range of concentration C (kg/dl) of said substance to be measured using the following equation;
space="preserve" listing-type="equation">(A-A.sub.h)/(α
×
L)<
C<
(A-A.sub.1)/(α
×
L)
space="preserve" listing-type="equation">A.sub.h =L×
a×
C.sub.h
space="preserve" listing-type="equation">A.sub.1 =L×
a×
C.sub.1where Ah ;
angle of rotation (degree) of urine measured measured at a maximum value (kg/dl) of concentration of optically active substance of a known concentration,Al ;
angle of rotation (degree) of urine measured measured at a minimum value (kg/dl) of concentration of optically active substance of a known concentration,Ch ;
maximum value (kg/dl) of concentration of optically active substance of a known concentration,C1 ;
minimum value (kg/dl) of concentration of optically active substance of a known concentration,α
;
specific angle of rotation (degree/cm·
dl/kg) of a substance to be measured,a;
specific angle (degree/cm·
dl/kg) of rotation of optically active substance of a known concentration,and L;
measurement light path length (cm). - View Dependent Claims (2, 3, 4, 5)
- and
Specification