Immunological method for quickly detecting heavy metal lead ions and kit
A lead ion and immunology technology, which is applied in the field of immunology and kits for rapid detection of heavy metal lead ions, can solve the problems of difficult product production and high cost, and achieve the effect of reducing manufacturing cost and retaining sensitivity and accuracy
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Embodiment 1
[0029] Detect heavy metal lead ion with immunological method of the present invention:
[0030] (1) Preparation of monoclonal antibody solution:
[0031] ①Synthesis of artificial antigen
[0032] Keyhole limpet hemocyanin (KLH), which is far from mouse, was selected as the immune carrier, and ovalbumin (OVA) was selected as the detection carrier.
[0033] 1) Mother liquor equipment:
[0034] Solution A: Weigh 12mg of CHX-A”-DTPA (diethyltriaminepentaacetic acid) and dissolve it in 1ml of pure water, heat to 60°C, and dissolve;
[0035] Solution B: Weigh 17mg Pb(NO 3 ) 2 Dissolve in 200 μl of 2% dilute nitric acid by volume;
[0036] Solution C: Weigh 10mg OVA, dissolve in 2ml HEPES (10mM, pH9.0), and place at 4°C;
[0037] Solution D: Measure 850μl KLH (5.8mg·ml -1 ), and stored at 4°C for later use.
[0038] 2) Preparation of immune antigen:
[0039] Take 30 μl of step 1) B solution and add dropwise to 350 μl of step 1) A solution, shake and react at room temperature...
Embodiment 2
[0064] Detect the specificity of the immunological method of the present invention:
[0065] The lead ion standard solution among the embodiment 1 is changed into Pb of different concentrations, Cd, Hg, Cr, Ca, Cu, Fe, heavy metal standard solutions such as Mn (purchased from National Iron and Steel Material Testing Center Iron and Steel Research Institute), adopt the same method operation, and read the final OD 450 value to test the specificity of the system for detecting lead. Test results such as figure 2 As shown, this result shows that the antibody is specific for lead ions, and there is no cross-reaction with other heavy metal ions.
Embodiment 3
[0067] Draw the lead ion ELISA detection system standard curve:
[0068] Add different concentrations of lead ion standard solutions (μg / L) on the antigen CHX-A"-DTPA-OVA coated plate with a concentration of 100ng / well: 10 -4 、10 -3 、10 -2 、10 -1 、10 0 、10 1 、10 2 、10 3 . After the lead ion solution reacted with the antigen at 37°C, add 100 ng / well of anti-lead monoclonal antibody at a certain concentration; after the reaction is completed, add the enzyme-labeled secondary antibody IgG-HRP; finally add TMB substrate for color development (the specific operation is the same as in the examples) 1). Sent to a microplate reader to read the absorbance value at 450nm (OD450). Get the logarithm with lead standard solution concentration as abscissa, OD450 value as ordinate, select the linear segment in the test result, draw and detect lead standard curve (such as image 3 shown). It can be concluded from the results that the system can effectively detect lead ions in the ra...
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