Method for simultaneously detecting sibutramine and fenfluramine in weight-losing health-care products
A qualitative detection and sample technology, applied in Raman scattering, material excitation analysis, etc., can solve the problems of being unsuitable for large-scale screening on site, cumbersome operation, long detection time, etc., and achieve the effect of a fast and convenient detection method
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Embodiment 1
[0055] A method for qualitatively detecting sibutramine and fenfluramine in weight loss health care products, comprising the following steps:
[0056] (1) Preparation of Raman-enhanced substrate:
[0057] Soak the glassware (round-bottomed flask) and rotor used in aqua regia for 12 hours, take out and rinse with water until tasteless, rinse with ultrapure water three times, and dry in an oven at 60°C for later use; the preparation mass fraction is 1% trisodium citrate Aqueous solution, 10mg / mL potassium chloroaurate solution, for use; heating the oil bath to 120°C and keeping it constant; setting the parameters of the magnetic stirrer: 565r / min;
[0058] ①Add 47mL of ultrapure water and 3mL of potassium chloroaurate to the round-bottomed flask and mix thoroughly; put the round-bottomed flask into a 120°C oil bath, while stirring with a magnetic stirrer and keep the temperature constant until the solution boils; add 2mL The 1% trisodium citrate aqueous solution continued to be...
Embodiment 2
[0077] The volume ratio of the mixed solution and Au@ZIF-8 in Example 1 was adjusted to 1:1, 1:2, 1:3, 1:4, and the others were the same as those in Example 1, and the detection was carried out.
[0078] The test results are as follows: the gold sol is mixed with the liquid to be tested in different proportions, and the results are as follows: Figure 5 As shown, when the volume of gold sol and the liquid to be tested is 1:2, the signal intensity is the highest.
Embodiment 3
[0080] The mixing time of the mixed solution and Au@ZIF-8 in Example 1 was adjusted to 1min, 2min, 3min, and 4min, and the others were the same as those in Example 1, and the detection was carried out.
[0081] The test results are: Au@ZIF-8 is mixed with the liquid to be tested at different times, and the results are as follows Image 6 As shown, the signal intensity was the highest when the mixing time was 2 min.
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