Method for determining alcohol concentration by using enzyme cycling method and alcohol determination kit
A technology of ethanol concentration and cyclic enzymatic method, applied in the field of medical testing, can solve the problems of poor specificity and large interference in measurement, and achieve the effect of high accuracy and good stability
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Embodiment 1
[0027] The ethanol assay kit of the present embodiment is a single reagent and consists of the following components:
[0028]
[0029] After the reagents are all dissolved and prepared, they are divided into bottles and freeze-dried to make dry powder reagents; before use, add purified water and reconstitute for use.
[0030] The testing conditions for the reagent of the present invention to measure ethanol in a sample are as follows: temperature: 30-37° C.; light path of cuvette: 1.0 cm. The main detection wavelength is 505nm, and the secondary wavelength is 700nm.
[0031] The method for measuring ethanol in a sample by using the ethanol determination reagent of the present invention is as follows: add the single reagent prepared above to the sample (calibration tube as the sample), read the absorbance A0 immediately after mixing, and read the Absorbance A1, ΔA=A1-A0. Among them, the sample volume is 5-10 μl, and the single reagent volume is 300 μl.
Embodiment 2
[0033] The ethanol assay kit of the present embodiment is a double reagent, consisting of reagent 1 and reagent 2, wherein:
[0034] Reagent 1
[0035] Tris buffer 0.2M
[0036] Trehalose 5g / L
[0037] NAD + 6g / L
[0038] Reagent 2
[0039]
[0040] After the reagents are all dissolved and prepared, they are divided into bottles to make liquid double reagents, which can be used directly.
[0041] Test condition is the same as embodiment 1.
[0042] The method for measuring ethanol in a sample by using the ethanol determination reagent of the present invention is as follows: add reagent 1 to the sample (calibration tube as a sample) and mix well, incubate at 30-37°C for 3-5min and read the absorbance A0, immediately add reagent 2 and mix well , After reacting at 30-37°C for 5 minutes, read the absorbance A1, ΔA=A1-A0. Among them, the sample volume is 30 μl, the reagent 1 volume is 225 μl, and the reagent 2 volume is 75 μl.
Embodiment 3
[0044] The ethanol determination kit of the present embodiment is three reagents, is made up of reagent 1, reagent 2 and reagent 3, wherein:
[0045] Reagent 1
[0046] 3-Trihydroxymethylmethylamine-2-hydroxypropanesulfonic acid buffer 0.5M
[0047] Glycerin 3g / L
[0048] NADP + 5g / L
[0049] Reagent 2
[0050]
[0051] Reagent 3
[0052] Oxidized INT 10g / L
[0053] After all the reagents are dissolved and prepared, they are divided into bottles to make liquid three reagents, which can be used directly.
[0054] Test condition is the same as embodiment 1.
[0055] The method for measuring ethanol in a sample by using the ethanol determination reagent of the present invention is as follows: add reagent 1 and reagent 2 to the sample (calibration tube as a sample) and mix well, read the absorbance A0 after incubating at 30-37°C for 3-5min, and immediately add the reagent 3 Mix well, and after reacting at 30-37°C for 5 minutes, read the a...
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