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
Active Publication Date: 2019-07-12
ZHEJIANG FORESTRY UNIVERSITY
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Problems solved by technology
[0007] The purpose of the present invention is to provide a direct-reading chromogenic reagent for highly sensitive detection of harmful residues of malachite green in food and environmental water bodies, and the chromogenic compound can be printed on the specific ratio shift of the stationary phase of the thin-layer chromatography plate to produce Obtained a new type of direct-reading chromogenic thin-layer chromatography plate, which can complete the process of chromatographic separation and color development in one step, and overcome the problems of cumbersome operation and easy diffusion of spots in the traditional scheme
Method used
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Embodiment 1
[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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The invention discloses a composite for color development direct reading rapid detection of malachite green and an application thereof, and belongs to the field of food detection analysis and environmental monitoring. The preparation method ofthe composite comprises the step that (1) a titanium alkoxide solution is prepared; (2) suction filtration is used so that a filter membrane adsorbsthe titanium alkoxide solution in a saturated mode; (3) a potassiumiodate-colloidal silver mixed solution is prepared; and (4) through the sucking filtration, the potassium iodate-colloidal silver solution passes the filter membraneabsorbing the titanium alkoxide solution in the saturated mode prepared in the step (2), a potassium iodate-Ag/nano-titania composite is generated through aone-step sol-gel reaction. According to the composite for color development direct reading rapid detection of malachite green and the application thereof,the potassium iodate-Ag/nano-titania compositeis used as a color developing agent for detecting malachite green in aquatic products or environmental water bodies;by using the potassium iodate-Ag/nano-titania composite as the color developing agent, a good color development substrate is provided, and color development stability is ensured; and time used for color development is greatly shortened while the sensitivity of color development is improved.
Description
technical field [0001] The invention relates to the fields of food detection and analysis and environmental monitoring, in particular to a potassium iodate-Ag / nano-titanium dioxide composite, a preparation method thereof, and an application for actually detecting malachite green content in aquatic products and water samples. Background technique [0002] Malachite green (Malachite green, MG) is a basic triphenylmethane dye. Due to its strong antibacterial and antiparasitic effects and low price, it is widely used in the disinfection of pond water and the prevention and treatment of saprolegniasis and rot in fish. Gill disease and parasitic disease, but easily absorbed by fish and metabolized rapidly. Fat-soluble leuco malachite green (LMG) has side effects such as carcinogenic, teratogenic, and mutagenic. Malachite green in aquatic products is a major organic pollutant. Therefore, whether it is to detect the residual level of malachite green in aquatic products or to monito...
Claims
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IPC IPC(8): G01N21/78G01N30/92
CPCG01N21/78G01N30/92G01N2021/775
Inventor 张宜明赖姝毓易炎忠柴婷婷庞林江
Owner ZHEJIANG FORESTRY UNIVERSITY
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