Quantitative analysis

• US 20010055784A1
• Filed: 05/16/2001
• Published: 12/27/2001
• Est. Priority Date: 05/18/2000
• Status: Active Grant

• Current Assignee: ARKRAY, Inc
• Original Assignee: ARKRAY, Inc
• Inventors: Noda, Yuichiro, Tanaka, Yoshiyuki, Hirao, Konomu
• Granted Patent: US 6,756,230 B2
• Time in Patent Office: Days
• US Class Current: 435/15
• CPC Class Codes: G01N 33/96 involving blood or serum control standard
• CPC Class Codes: Y10T 436/10 Composition for standardization, calibration, simulation, stabilization, preparation or preservation; processes of use in preparation for chemical testing
• CPC Class Codes: Y10T 436/193333 In aqueous solution
• CPC Class Codes: Y10T 436/25 including sample preparation
• CPC Class Codes: Y10T 436/255 including use of a solid sorbent, semipermeable membrane, or liquid extraction

Abstract

Amounts of components in a specimen can be analyzed with excellent quantitativity. The analysis includes: measuring an amount of a component to be analyzed in a specimen; measuring an amount of a standard component present originally and homeostatically in the specimen other than the component to be analyzed; determining the amount of the specimen from the amount of the standard component thus measured and a known concentration of the standard component in the specimen; and determining a concentration of the component to be analyzed in the specimen from the amount of the specimen thus determined and the amount of the component to be analyzed thus measured. The quantitative analysis of the present invention allows a component to be analyzed to be measured with high quantitativity as shown in FIG. 1.

Claims

1. A quantitative analysis for measuring a concentration of a component to be analyzed in a specimen, comprising:

measuring an amount of a component to be analyzed in a specimen;

measuring an amount of a standard component present originally and homeostatically in the specimen other than the component to be analyzed;

determining an amount of the specimen from the amount of the standard component thus measured and a known concentration of the standard component in the specimen; and

determining a concentration of the component to be analyzed in the specimen from the amount of the specimen thus determined and the amount of the component to be analyzed thus measured.

2. The quantitative analysis according to

claim 1

, wherein the standard component is at least one selected from the group consisting of sodium ion, chloride ion, potassium ion, magnesium ion, calcium ion, total protein, and albumin.

3. The quantitative analysis according to

claim 2

, wherein the standard component is at least one selected from the group consisting of magnesium ion, calcium ion, and total protein.

4. The quantitative analysis according to

claim 1

, wherein the specimen is an aqueous liquid specimen derived from an organism.

5. The quantitative analysis according to

claim 4

, wherein the aqueous liquid specimen is at least one selected from the group consisting of blood, urine, saliva, lymph, a cerebrospinal fluid, and an intercellular fluid.

6. The quantitative analysis according to

claim 5

, wherein the aqueous liquid specimen is blood.

7. The quantitative analysis according to

claim 1

, wherein the component to be analyzed is at least one selected from the group consisting of glutamic-oxaloacetic transaminase (GOT), glutamic-pyruvic transaminase (GPT), γ

-glutamyl transpeptidase (γ

-GTP), creatine kinase (CPK), triglyceride (TG), amylase (Amy), HDL-cholesterol (HDL-C), and alkaline phosphatase (ALP).

8. The quantitative analysis according to

claim 1

, wherein the specimen is retained in a porous material and is then recovered from the porous material for analysis.

9. The quantitative analysis according to

claim 8

, wherein the specimen is retained in the porous material, is dried, and is then recovered.

10. The quantitative analysis according to

claim 8

, wherein the porous material retaining the specimen is dipped in an extractant and the specimen is extracted from the porous material to be recovered.

11. The quantitative analysis according to

claim 10

, wherein the extractant is at least one selected from the group consisting of a buffer solution, a physiological salt solution, and purified water.

12. The quantitative analysis according to

claim 10

, wherein an amount of the extractant is 1 to 1000 times the porous material by volume.

13. The quantitative analysis according to

claim 10

, wherein a ratio of the extractant to the porous material per volume is constant.

14. The quantitative analysis according to

claim 10

, wherein the quantitative analysis comprises:

measuring an amount of a component to be analyzed in a test sample containing an extractant and a specimen recovered from the porous material;

measuring an amount of the standard component to be analyzed in the test sample;

determining an amount of the specimen from the amount of the standard component thus measured and a known concentration of the standard component in the specimen; and

determining a concentration of the component to be analyzed in the specimen from the amount of the specimen thus determined and the amount of the component to be analyzed in the test sample thus measured.

15. The quantitative analysis according to

claim 14

, wherein the concentration of the component to be analyzed contained in the specimen is determined by a formula:

A=Z×

(Y/X),

where A denotes the concentration of the component to be analyzed, Z denotes a measured concentration value of the component to be analyzed in the test sample, X denotes a measured concentration value of the standard component, and Y denotes a known concentration value of the standard component in the specimen.

16. The quantitative analysis according to

claim 1

, wherein the specimen is blood serum or blood plasma, and known concentration values of the standard components contained in the specimen comprise 134 to 146 mEq/litre of sodium ion, 97 to 107 mEq/litre of chloride ion, 3.2 to 4.8 mEq/litre of potassium ion, 1.5 to 2.0 mEq/litre of magnesium ion, 8.4 to 10.2 mEq/litre of calcium ion, 6.7 to 8.3 g/100 ml of total protein, and 3.5 to 5.2 g/100 ml of albumin.

17. The quantitative analysis according to

claim 1

, wherein the specimen is blood serum, the standard component is magnesium ion, and the magnesium ion in the blood serum has a known concentration of 1.8 mEq/litre.

18. The quantitative analysis according to

claim 1

, wherein the specimen is blood serum, the standard component is calcium ion, and the calcium ion in the blood serum has a known concentration of 9.3 mEq/litre.

19. The quantitative analysis according to

claim 1

, wherein the specimen is blood serum, the standard component is total protein, and the total protein in the blood serum has a known concentration of 7.5 g/100 ml.