Method for rapidly quantifying concentrations of polystyrene microspheres and tetracycline in water
A technology of polystyrene microspheres and tetracycline, applied in the fields of environmental pollution and chemical analysis, to achieve the effect of simple operation
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Embodiment 1
[0046] The method of the present invention quickly quantifies the concentration of polystyrene microspheres and tetracycline in water. After diluting or concentrating the sample to be tested containing polystyrene microspheres and tetracycline by a certain multiple, an ultraviolet-visible spectrophotometer is used to measure the concentration of the sample to be tested at a specific wavelength. The absorbance, according to the calibration curve or regression equation between the established absorbance and the concentration of polystyrene microspheres and tetracycline, calculate the concentration of polystyrene microspheres and tetracycline in the sample to be tested.
[0047] 1. Preparation of standard suspension: Prepare 50mL polystyrene microspheres with a concentration of 5.69×10 7 polystyrene microspheres (MS)-tetracycline (TC) mixed suspension with tetracycline concentration 20 mg / L, diluted 1.25, 2, 3, 10, 12.5, 20, 33, 100 times respectively, and the blank group was adde...
Embodiment 2
[0057] According to the test method for quickly quantifying the concentration of polystyrene microspheres and tetracycline in water of the present invention, the mutual influence of the coexistence of polystyrene microspheres and tetracycline under different concentration conditions is explored, and the method of the present invention is verified to be feasible. Specific steps are as follows:
[0058] 1. Preparation of standard suspension: Prepare a certain amount of polystyrene microspheres with a concentration of 5.69×10 7 / mL and polystyrene microspheres (MS)-tetracycline (TC) mixed suspension with tetracycline concentrations of 1, 5, 10, and 20 mg / L, and then diluted 1.25, 2, 3, 10, 12.5, 20, 33, 100 times, add the background solution to the blank group. As a control, a polystyrene microsphere suspension with the same concentration of C and a tetracycline solution with the same concentration of C' were prepared and diluted 1.25, 2, 3, 10, 12.5, 20, 33, and 100 times, resp...
Embodiment 3
[0063] According to the method for fast quantitative polystyrene microspheres and tetracycline concentration in water of the present invention, the filtering effect of the same kind of filter material when polystyrene microspheres and tetracycline coexist in the environment of different ionic strengths is studied, and concrete steps are as follows:
[0064] 1. Preparation of mixed suspension: prepare polystyrene microspheres at a concentration of 5.69×10 7 / mL, the tetracycline concentration is 20mg / L, the polystyrene microsphere (MS)-tetracycline (TC) mixed suspension that background solution ionic strength is respectively 1mM KCl, 50mM KCl carries out filtration experiment.
[0065] 2. Filtration experiment: Use a filter column with an inner diameter of 16mm for wet filling, and the thickness of the filter layer is 15.0±0.1cm. After the filter column is filled, perform the filtration experiment. The filtration flow rate is 1.5m / h, the pH=7.0±0.5, and the environment is room ...
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