Method for tracing origin of Largehead Atractylodes Rh based on nano-effect visual sensor
A technology of origin traceability and nano-effects, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions. and other problems, to achieve the effect of small size, fast response and high cost
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[0030] A method for tracing the origin of Atractylodes macrocephala based on a nano-effect visual sensor, the schematic diagram of which is shown in figure 1 , including the following steps:
[0031] 1) Preparation of nano-gold: 1mL concentration of 25mM HAuCl 4 The solution was mixed with 99mL of deionized water, and at a temperature of 110°C, quickly added 10mL with a concentration of 1.455×10 -2 M (0.0427g) of trisodium citrate solution; The resulting reaction system was refluxed for 30min under vigorous stirring, and the reaction solution turned red and stirred to room temperature; Centrifuged at a speed of 3000rpm for 10min to remove larger nanoparticles, and Centrifuge at a rate of 7000rpm for 10min to remove unreacted chemical substances in the solution for purification, and the obtained AuNPs are redissolved in ultrapure water to obtain a gold nano solution with a concentration of 7nmol / L;
[0032] 2) Take 13 samples of Atractylodes Rhizoma from three producing areas...
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