A kind of measuring method of methylmercury and ethylmercury
A determination method and technology of ethyl mercury, applied in the field of heavy metal detection, can solve the problems of high adsorption efficiency and good market prospects, and achieve the effects of improving adsorption efficiency, good extraction effect and accurate analysis results
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Embodiment 1
[0056] The concrete steps of methylmercury and ethylmercury determination method that the present embodiment involves are:
[0057] Step 1: Preparation of thiosemicarbazide-modified magnetic chitosan (AT-MCS):
[0058] (1) Dissolve 2.0 g of ferric chloride hexahydrate in 40 mL of ethylene glycol, then add 6 g of sodium acetate trihydrate and 20 ml of ethanolamine, stir and dissolve to prepare a mixed solution for subsequent use;
[0059] (2) The mixed solution prepared in the step (1) was reacted for 8h at 200°C in the solvothermal reactor, and the prepared mixture in the autoclave was washed with ultrapure water to obtain ferric iron tetraoxide ( NH 2 -Fe 3 o 4 ), the prepared NH 2 -Fe 3 o 4 Vacuum dry at 60°C for 12 hours;
[0060] (3) Take 0.05gNH 2 -Fe 3 o 4 Add it to the mixture of 10mL ultrapure water and 1mL glutaraldehyde, and disperse it ultrasonically for 5-8 minutes to prepare the dispersion for later use;
[0061] (4) getting 0.03g chitosan and being dis...
Embodiment 2
[0094] This embodiment measures the residues of methylmercury and ethylmercury in the water at the tip of the tap water pipe network in Qingdao, the surface water of Xiaozhushan Reservoir in Qingdao, and the surface water of Jihongtan Reservoir in Qingdao. 120 μm rapid qualitative filter paper filtration, and then filter with 0.45 μm filter membrane; the filtered water sample is measured by the method described in Example 1, and the accuracy test is carried out by the method described in Example 2, and methylmercury is prepared respectively Carry out standard addition recovery test with the actual water samples with three concentrations of ethylmercury concentrations of 0.12μg / L, 0.4μg / L, and 1.2μg / L. Each concentration point is measured 3 times and calculated 3 times The measured average value, relative standard deviation and recovery rate of standard addition; among them, methylmercury and ethylmercury were not detected in the blanks of the three water samples; the test resul...
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