Preparation method for eriochrome black T test paper for urinary calcium ions
A technology for detecting test paper and calcium ions, which is applied in the field of analytical chemistry, can solve the problems of unstable hardness electrodes, short service life, large measurement errors, etc., and achieve the effects of easy mass production, simple operation, high accuracy and sensitivity
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Embodiment 1
[0025] (1) Prepare solution A: In the reactor, add deionized water: 76mL, chrome black T: 1.0g, triethanolamine: 23g, stir and dissolve to obtain solution A;
[0026] (2) Preparation of solution B: In the reactor, add deionized water: 35mL, ammonium chloride: 6g, stir to dissolve, then add ammonia water: 59mL, stir evenly to obtain solution B;
[0027] (3) Preparation of solution C: In the reactor, add deionized: 94mL, polyvinyl alcohol: 6g, heat to dissolve, cool to room temperature, and obtain solution C;
[0028] (4) Prepare solution D: In the reactor, press MgCl 2 The molar ratio with EDTA is 1:1, and the concentration of magnesium-EDTA is prepared to be 0.025mol / L to obtain solution D;
[0029] (5) Immersion test paper for detection of calcium ions in chrome black T urine: mix solution A: solution B: solution C: solution D according to the volume ratio: 65:10:20:5, mix the filter paper quantitative filter paper completely into solution A and Solution B in the mixed solu...
Embodiment 2
[0032] (1) Prepare solution A: In the reactor, add deionized water: 75mL, chrome black T: 0.5g, triethanolamine: 24.5g, stir and dissolve to obtain solution A;
[0033] (2) Preparation of solution B: In the reactor, add deionized water: 33mL, ammonium chloride: 7g, stir to dissolve, then add ammonia water: 60mL, stir evenly to obtain solution B;
[0034] (3) Preparation of solution C: In the reactor, add deionization: 95mL, polyvinyl alcohol: 5g, heat to dissolve, cool to room temperature, and obtain solution C;
[0035] (4) Prepare solution D: In the reactor, press MgCl 2 The molar ratio with EDTA is 1:1, and the concentration of magnesium-EDTA is prepared to be 0.020mol / L to obtain solution D;
[0036] (5) Immersion test paper for detection of calcium ions in chrome black T urine: mix solution A: solution B: solution C: solution D according to the volume ratio: 62:12:22:4, mix the filter paper quantitative filter paper completely into solution A and Solution B in the mixed s...
Embodiment 3
[0039] (1) Prepare solution A: In the reactor, add deionized water: 74mL, chrome black T: 2.0g, triethanolamine: 24g, stir and dissolve to obtain solution A;
[0040] (2) Prepare solution B: In the reactor, add deionized water: 38mL, ammonium chloride: 5g, stir to dissolve, then add ammonia water: 57mL, stir evenly to obtain solution B;
[0041] (3) Preparation of solution C: In the reactor, add deionization: 96mL, polyvinyl alcohol: 4g, heat to dissolve, cool to room temperature, and obtain solution C;
[0042] (4) Prepare solution D: In the reactor, press MgCl 2 The molar ratio with EDTA is 1:1, and the concentration of magnesium-EDTA is prepared to be 0.030mol / L to obtain solution D;
[0043] (5) Immersion test paper for detection of calcium ions in chrome black T urine: mix solution A: solution B: solution C: solution D according to the volume ratio: 68:8:18:6, mix the filter paper quantitative filter paper completely into solution A and Solution B in the mixed solution ...
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