CN101169433A - Potassium diagnosis/determination reagent kit and potassium concentration determination method - Google Patents
Potassium diagnosis/determination reagent kit and potassium concentration determination method Download PDFInfo
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- CN101169433A CN101169433A CNA2006100968978A CN200610096897A CN101169433A CN 101169433 A CN101169433 A CN 101169433A CN A2006100968978 A CNA2006100968978 A CN A2006100968978A CN 200610096897 A CN200610096897 A CN 200610096897A CN 101169433 A CN101169433 A CN 101169433A
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- China
- Prior art keywords
- reagent
- coenzyme
- stabilizing agent
- potassium
- tryptophanase
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Abstract
The invention relates to a kalium diagnosing/testing reagent box which utilizes the enzyme color method and the enzyme connection method, and also relates to a method for testing the consistence of kalium, and the elements and the components of reagent. The invention belongs to the technical field of the medicine/food/environment check. The reagent box of the invention mainly comprises cushion fluid, coenzyme, hydroxy-tryptophan, coenzyme A, hydroxy-tryptophan enzyme, pyruvate phosphokinase and stabilizer. A series of enzyme reactions occur by mixing the sample and the reagent according to a certain volume rate. Then the reactant is arranged under an ultraviolet and visible light analysis instrument to test the reduction speed of the absorbency at the 340nm of the main wavelength, thereby testing the consistence of the kailium. By adopting the invention, the testing result can be obtained by the ultraviolet and visible light analysis instrument.
Description
Technical field
The present invention relates to a kind of potassium diagnosis/determination kit, the invention still further relates to the method for measuring potassium concn simultaneously, belong to medical science/food/environmental test determination techniques field.
Background technology
The clinical meaning of three decisive levels of serum potassium: be lower than the reference value lower limit, the performance hypopotassaemia, its reason has renal tubular disease, high aldosterone disease, hyperinsulinism, metabolic alkalosis, potassium ion is transferred in the cell etc. when diuretic therapy, insulin for treating diabetes ketosis.Be higher than the reference value upper limit, may be weak, the poisoning of diabetes ketosis, hypoadrenocorticism etc. by renal glomerular disease, renal function.When blood potassium up to 7.5mmol/L or when above patient arrhythmia cordis will appear, should consider to determine suitable therapeutic scheme.When serum potassium surpasses 10mmol/L, ventricular fibrillation can take place, cardiac arrest and death.High potassium makes cardiac arrest diastole.
Potassium is measured method commonly used at present has: isotope dilution mass spectrometry, neutron activation method, flare photometer, chemical assay, ion selective electrode method, atom spectrophotometric method, enzyme kinetics method.
Flame photometry nineteen fifty is brought into use and the flame photometry always used till today detects the Na of serum, urine, cerebrospinal fluid and ascites pleural fluid
+And K
+, be a kind of emission spectrometry method.Assay method is divided into internal reference method and two kinds of outer standard laws.Outer standard law operate miss is bigger, does not generally adopt.The main now internal standard method of using, promptly sample and titer adopt internal standard element lithium or the caesium of adding same concentrations to measure.During operation, the solution that will contain lithium is measured the concentration of K, Na and Li simultaneously as dilution, with the Na/Li and the K/Li ratio of sample and titer, calculates Na, K concentration.Because serum diluting multiple is big, the influence of serum proteins viscosity almost can be ignored.
Chemical assay mainly utilizes multiple ring crown compound such as cave crown ether or spherical crown ether, also be called crown ether, being ionophore measures, owing in the macrocyclic structure hole is arranged, the intramolecule oxygen atom has not, and share electron pair can combine with metallic ion, according to the hole size, alternative metallic ion in conjunction with different-diameter, thus can reach the purpose of measuring ion concentration.Measure serum K, generally adopt common crown ether anionic dye to carry out colorimetric assay.
Ion selective electrode method ISE method is to adopt sensitive specific electrode special, at the K of body fluid such as the cleer and peaceful urine of the enterprising promoting circulation of blood of instrumentation
+, Na
+Mensuration, because of the sample consumption is few, quick and precisely, the trend that replaces additive method is arranged almost.Its Instrument measuring principle is that ion-selective electrode and contrast electrode combination are immersed in the sample solution to be measured, detects.Present existing type of electrodes is: 1. glass-membrane electrode, inductive material be glass film pH electrode, K arranged
+Electrode and Na
+Electrode; 2. immobilon-p electrode by the extrusion forming of slightly solubility metallics, has Cl with solid film or odd-numbered day film as the electrode of sense film
-Electrode and F
-Electrode; 3. liquid film electrode is with epoxy resin or the interior dress polyvinyl chloride Ca that is sense film
2+Electrode; 4. the K that makes with the valinomycins film
+Electrode.Above-mentioned electrode all has certain life-span, because electrode uses a period of time will automatic aging, the term of validity is different in size.
Atom spectrophotometric method atom spectrophotometric method can be used for detecting serum K+, Na+, trivial operations, and error is bigger, and is easy not as good as flame photometry.
The decisive method that potassium is measured is isotope dilution mass spectrometry and neutron activation method.The method that WHO recommends is a flare photometer.Ion selective electrode method application at present is comparatively general, but electrode cost costliness.
Enzyme assay and flare photometer or ion selective electrode method all have consistance preferably, and strong interference immunity, and good stability has remedied the deficiency that Biochemical Analyzer can not measured potassium sodium simultaneously.Analytical performance is preferably arranged, be easy to robotization, must replace flare photometer in the clinical chemistry analysis becomes the conventional analysis project.
Summary of the invention
The technical problem to be solved in the present invention is: propose a kind of enzymic colorimetric (EnzymaticColorimetric Method) and enzyme (even) united method (Couple Reaction) technology utilized, continuous monitoring reduced form nicotinamide coenzyme (reduced coenzyme) is in the variation of 340nm wavelength place absorbance, measured the method for potassium concn, simultaneously, the present invention also will provide in order to realize the potassium diagnosis/determination kit of this method, adopt this reagent not only can be ultraviolet analyser or half, carry out measuring kalium concentration on the automatic clinical chemistry analyzer, and finding speed is fast, the accuracy height, thereby can obtain practical applying.
Method for measuring kalium concentration principle of the present invention is as follows:
Tryptophane+water
TryptophanasePyruvic acid+ammonium ion+indoles
Pyruvic acid+coacetylase+coenzyme
Pyruvic dehydrogenaseCarbon dioxide+
Acetyl coenzyme A+reduced coenzyme
Tryptophanase (the tryptophanase that this method utilization needs potassium ion to activate; EC4.1.99.1) enzyme (idol) connection pyruvic dehydrogenase (pyruvate dehydrogenase; EC 1.2.1.51) enzyme ' s reaction speeding colourimetry.The tryptophan reaction of tryptophanase enzymolysis produces pyruvic acid, the effect of uniting pyruvic dehydrogenase again by (idol), coenzyme (not having absorption peak at the 340nm place) reduces the most at last becomes reduced coenzyme (absorption peak being arranged at the 340nm place), thereby measured the speed that reduced coenzyme rises in 340nm place absorbance, by measuring the speed that 340nm place absorbance rises, can calculate the concentration of potassium.
Experiment shows, takes all factors into consideration from the accuracy of measurement result and economy two aspects of preparation cost, no matter is single agent, two agent or three doses, and the potassium diagnosis/determination kit of the present invention of following composition relation is comparatively desirable:
Damping fluid 100mmol/L
Stabilizing agent 50mmol/L
Coenzyme 3mmol/L
Tryptophane 20mmol/L
Coacetylase 6mmol/L
Tryptophanase 12000U/L
Pyruvic dehydrogenase 16000U/L
Potassium diagnosis/determination kit of the present invention can be single agent, comprising:
Damping fluid, stabilizing agent, coenzyme, tryptophane, coacetylase, tryptophanase, pyruvic dehydrogenase.
Kit can be a dry powder, and use the back that is dissolved in water before use; Also can be mixed with liquid reagent, directly use.
Also above-mentioned single agent reagent can be made into following pair of agent reagent:
Reagent 1
Damping fluid, stabilizing agent, coenzyme, tryptophane, coacetylase.
Reagent 2
Damping fluid, stabilizing agent, tryptophanase, pyruvic dehydrogenase.
Coenzyme, tryptophane, coacetylase, tryptophanase, the position of pyruvic dehydrogenase in reagent 1 or reagent 2 can not limit.Kit can be a dry powder, and use the back that is dissolved in water before use; Also can be mixed with liquid reagent, directly use.
Above-mentioned single agent reagent can also be made into following three doses of reagent:
Reagent 1
Damping fluid, stabilizing agent, coenzyme, coacetylase.
Reagent 2
Damping fluid, tryptophane.
Reagent 3
Damping fluid, stabilizing agent, tryptophanase, pyruvic dehydrogenase.
Coenzyme, tryptophane, coacetylase, tryptophanase, the position of pyruvic dehydrogenase in reagent 1, reagent 2 or reagent 3 can not limit.Kit can be a dry powder, and use the back that is dissolved in water before use; Also can be mixed with liquid reagent, directly use.
No matter be single agent, two agent or three doses, the present invention measures the method for potassium concn, and its coenzyme can be NADP
+, NAD
+Or thio-NAD
+In a kind of.
Embodiment
The present invention is further illustrated below in conjunction with examples of implementation.
Embodiment one
The potassium diagnosing/determining reagent of present embodiment is single reagent, comprising:
Three (ethyloic) aminomethane-hydrochloride buffer 100mmol/L
Stabilizing agent 50mmol/L
Coenzyme 3mmol/L
Tryptophane 20mmol/L
Coacetylase 6mmol/L
Tryptophanase 12000U/L
Pyruvic dehydrogenase 16000U/L
Reagent divides the bottle of packing into after all dissolving and preparing, and carries out freeze drying, makes powdered reagent; Before the use, add pure water, use after redissolving.
On automatic clinical chemistry analyzer, set: 37 ℃ of temperature, 10 minutes reaction time, initial absorbance≤0.1, test predominant wavelength 340nm, test commplementary wave length 405nm, the volume ratio of tested potassium sample and reagent is 1/25, the Direction of Reaction is positive reaction (reaction of rising), about about 1 minute of time delay is about 2 minutes detection times.
After adding sample and reagent, make them mixed and have reaction, reactant places under the Biochemical Analyzer the most at last, detects the speed that predominant wavelength 340nm absorbance rises, thereby calculates the concentration of potassium.
Embodiment two
The potassium diagnosing/determining reagent of present embodiment is double reagent, comprising:
Reagent 1
Three (ethyloic) aminomethane-hydrochloride buffer 100mmol/L
Stabilizing agent 50mmol/L
Coenzyme 3mmol/L
Tryptophane 20mmol/L
Coacetylase 6mmol/L
Reagent 2
Three (ethyloic) aminomethane-hydrochloride buffer 100mmol/L
Stabilizing agent 50mmol/L
Tryptophanase 12000U/L
Pyruvic dehydrogenase 16000U/L
Reagent divides the bottle of packing into after all dissolving and preparing, and makes liquid double reagent, can directly use.
On automatic clinical chemistry analyzer, set: 37 ℃ of temperature, 10 minutes reaction time, initial absorbance≤0.1, test predominant wavelength 340nm, test commplementary wave length 405nm, the volume ratio of tested potassium sample and reagent 1, reagent 2 is 2/20/5, the Direction of Reaction is positive reaction (reaction of rising), about about 1 minute of time delay is about 2 minutes detection times.
After adding sample and reagent, make them mixed and have reaction, reactant places under the Biochemical Analyzer the most at last, detects the speed that predominant wavelength 340nm absorbance rises, thereby calculates the concentration of potassium.
Embodiment three
The potassium diagnosing/determining reagent of present embodiment is three reagent, comprising:
Reagent 1
Three (ethyloic) aminomethane-hydrochloride buffer 100mmol/L
Stabilizing agent 50mmol/L
Coenzyme 3mmol/L
Coacetylase 6mmol/L
Reagent 2
Three (ethyloic) aminomethane-hydrochloride buffer 100mmol/L
Tryptophane 20mmol/L
Reagent 3
Three (ethyloic) aminomethane-hydrochloride buffer 100mmol/L
Stabilizing agent 50mmol/L
Tryptophanase 12000U/L
Pyruvic dehydrogenase 16000U/L
Reagent divides the bottle of packing into after all dissolving and preparing, and makes liquid three reagent, can directly use.
When measuring potassium concn, on automatic clinical chemistry analyzer, set: 37 ℃ of temperature, 10 minutes reaction time, initial absorbance≤0.1, test predominant wavelength 340nm, test commplementary wave length 405nm, the volume ratio of tested potassium sample and reagent 1, reagent 2, reagent 3 is 4/40/5/5, the Direction of Reaction is positive reaction (reaction of rising), and about about 1 minute of time delay is about 2 minutes detection times.
After adding sample and reagent, make them mixed and have reaction, reactant places under the Biochemical Analyzer the most at last, detects the speed that predominant wavelength 340nm absorbance rises, thereby calculates the concentration of potassium.
The applicant adopts other various reduced form chromogens combinations of putting down in writing in the above summary of the invention all can reach purpose of the present invention through experimental verification, in view of situation such as determination step and above embodiment roughly the same, do not separately enumerate.
In a word, experiment showed, and adopt assay method of the present invention can draw required measurement result by general biochemical analyzer fully, and highly sensitive, degree of accuracy good, and is easy to utilize.
Claims (6)
1. the method for measurement of concentration of the potassium of enzymic colorimetric and enzyme-linked method, its method principle is as follows:
The end reaction thing is placed under ultraviolet analyser or half, the automatic clinical chemistry analyzer, detect the speed that predominant wavelength 340nm absorbance rises, calculate the concentration measurement result of potassium.
2. potassium diagnosis/determination kit, principal ingredient comprises:
Damping fluid 20---500mmol/L
Stabilizing agent 1---50mmol/L
DPN diphosphopyridine nucleotide---6mmol/L
Tryptophane 1---50mmol/L
Coacetylase 1---50mmol/L
Tryptophanase 1000---80000U/L
Pyruvic dehydrogenase 1000---80000U/L
It is characterized in that: kit can be a dry powder, and use the back that is dissolved in water before use;
Also can be mixed with liquid reagent, directly use.
3. according to the described potassium diagnosis/determination kit of claim 2, it is characterized in that:
Form single agent reagent by damping fluid, stabilizing agent, coenzyme, tryptophane, coacetylase, tryptophanase, pyruvic dehydrogenase.
4. according to the described potassium diagnosis/determination kit of claim 2, it is characterized in that:
Form two agent reagent by damping fluid, stabilizing agent, coenzyme, tryptophane, coacetylase, tryptophanase, pyruvic dehydrogenase; Reagent 1 is made up of damping fluid, stabilizing agent, coenzyme, tryptophane, coacetylase; Reagent 2 is made up of damping fluid, stabilizing agent, tryptophanase, pyruvic dehydrogenase.Coenzyme, tryptophane, coacetylase, tryptophanase, the position of pyruvic dehydrogenase in reagent 1 or reagent 2 can not limit.
5. according to the described potassium diagnosis/determination kit of claim 2, it is characterized in that:
Form multi-agent reagent by damping fluid, stabilizing agent, coenzyme, tryptophane, coacetylase, tryptophanase, pyruvic dehydrogenase; Reagent 1 is made up of damping fluid, stabilizing agent, coenzyme, coacetylase; Reagent 2 is made up of damping fluid, tryptophane; Reagent 3 is made up of damping fluid, stabilizing agent, tryptophanase, pyruvic dehydrogenase.Coenzyme, tryptophane, coacetylase, tryptophanase, the position of pyruvic dehydrogenase in reagent 1, reagent 2 or reagent 3 can not limit.
6. according to the described potassium diagnosis/determination kit of claim 2, it is characterized in that: also comprise stabilizing agent 1-4000mmol/L or 0.1%-100% volume ratio.Described stabilizing agent is: ammonium sulfate (Ammonia Sulfate), glycerine (Glycerol), propylene glycol (Propylene Glycol), ethylene glycol (Ethylene glycol) and at least one of the preservatives.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100968978A CN101169433A (en) | 2006-10-24 | 2006-10-24 | Potassium diagnosis/determination reagent kit and potassium concentration determination method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100968978A CN101169433A (en) | 2006-10-24 | 2006-10-24 | Potassium diagnosis/determination reagent kit and potassium concentration determination method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101169433A true CN101169433A (en) | 2008-04-30 |
Family
ID=39390121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100968978A Pending CN101169433A (en) | 2006-10-24 | 2006-10-24 | Potassium diagnosis/determination reagent kit and potassium concentration determination method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101169433A (en) |
-
2006
- 2006-10-24 CN CNA2006100968978A patent/CN101169433A/en active Pending
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Open date: 20080430 |