Composite for color developmentdirect reading rapid detection of malachite green and application thereof
A complex and mixed solution technology, applied in measurement devices, analysis by chemical reaction of materials, material analysis by observing the influence of chemical indicators, etc., can solve the problems of easy diffusion of spots, complicated operation, etc. Inexpensive, affordable, high-contrast effects
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[0046] 1. Preparation of potassium iodate-Ag / nano-titanium dioxide composite
[0047] (1) Prepare a 100 mM tetrabutyl titanate solution, the solvent is a toluene / ethanol solution (v:v=1:1), and stir at room temperature for one hour.
[0048] The 5% potassium iodate solution prepared by potassium iodate-colloidal silver mixed solution is prepared as follows:
[0049] Colloidal silver solution can be synthesized as follows: 0.5mL of silver nitrate solution (0.01mol / L), 0.5mL of citric acid solution (0.01mol / L) and 19ml of water are mixed in a 150mL round-bottomed flask and stirred vigorously Slowly add 0.6 mL of sodium borohydride solution (0.01 mol / L) dropwise to obtain a yellow nano-silver solution, and continue stirring for 20 min to cool and store for later use.
[0050] The colloidal silver solution is diluted with deionized water according to a dilution ratio of 1-10 times to prepare a potassium iodate solution as a mother liquor.
[0051] Measure 20 mL of colloidal silv...
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