A kind of compound and application for rapid detection of malachite green by direct-reading color development
A technology of complexes and mixed solutions, applied in measuring devices, analyzing materials through chemical reactions, and analyzing materials through observing the influence of chemical indicators, can solve problems such as cumbersome operations and easy diffusion of spots, and achieve The price is easy to get, low price, and the effect of ensuring stability
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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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