Preserving solution for sputum and preparation method
A technology for preserving liquids and solutions, applied in microorganism-based methods, preservation of human or animal bodies, biochemical equipment and methods, etc., can solve the problems of high cost, inability to produce proteinase K, downstream industries relying on imports, etc. low cost effect
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Embodiment 1
[0014] A kind of preparation method of sputum preservation solution 1000ml is as follows:
[0015] S1: Prepare 100ml of 1.5% phosphorus trichloride solution;
[0016] S2: Weigh each component according to the following components and contents: 2.5g dithiothreitol, 17.5g trishydroxymethylaminomethane, 0.85g sodium chloride, 0.35g disodium hydrogen phosphate, 0.05g potassium dihydrogen phosphate, 0.65g guanidine isothiocyanate, add step S1 and make phosphorus trichloride solution and 500ml nucleic acid-free water dissolve and stir;
[0017] S3: Adjust the pH of the solution obtained in step S2 to 5.5-8.5 to prepare a preservation solution.
[0018] Among them, Dithiothreitol (DTT for short) is a small molecule organic reducing agent with a chemical formula of C4H10O2S2. It is a linear molecule in the reduced state, and becomes a six-membered ring structure containing disulfide bonds after being oxidized. DTT is used as a reducing agent and deprotecting agent for thiolated DNA ...
Embodiment 2
[0027] A kind of preservation liquid of sputum, the preparation method of every 1000ml preservation liquid is as follows:
[0028] S1: Prepare 100ml of 0.90% phosphorus trichloride solution;
[0029] S2: Weigh each component according to the following components and contents: 0.85g dithiothreitol, 12.5g trishydroxymethylaminomethane, 4.5g sodium chloride, 0.35g disodium hydrogen phosphate, 0.15g potassium dihydrogen phosphate, 1.0 g of guanidine hydrochloride was added to step S1 to prepare phosphorus trichloride solution (0.9%) and 500 ml of nucleic acid-free water to dissolve and stir evenly;
[0030] S3: adjusting the pH of the solution obtained in step S2 to 5.5-8.5 to obtain the preservation solution.
[0031] The main difference between this example and the examples is that the virus is inactivated by replacing guanidine isothiocyanate with guanidine hydrochloride. Guanidine hydrochloride (CH6ClN3), used as a strong denaturant in the experiment of extracting total RNA ...
Embodiment 3
[0037] A kind of preservation liquid of sputum, the preparation method of every 1000ml preservation liquid is as follows:
[0038] S1: Prepare 100ml of 2.0% phosphorus trichloride solution;
[0039] S2: Weigh each component according to the following components and contents: 1.35g dithiothreitol, 8.0g trishydroxymethylaminomethane, 7.8g sodium chloride, 1.25g disodium hydrogen phosphate, 0.13g potassium dihydrogen phosphate , 2.13g guanidine isothiocyanate, add step S1 to make phosphorus trichloride solution and 500ml nucleic acid-free water dissolve and stir evenly, constant volume;
[0040] S3: adjusting the pH of the solution obtained in step S2 to 5.5-8.5 to obtain the preservation solution.
[0041] Use the sputum preserved in the preservation solution for the detection of the new crown nucleic acid detection reagent: take the sputum of 8 healthy people in the above preservation solution, mix well, and test it separately with the new crown nucleic acid detection reagent....
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