Precautions for using the acid glycoprotein assay kit

When using acid glycoprotein assay kits (especially those based on enzyme-linked immunosorbent assay (ELISA)), the following precautions should be taken to ensure the accuracy and reliability of the test results:

1. Sample collection and processing

Sample types: including serum, plasma, cell culture supernatant, urine, pleural and peritoneal fluid, etc. Suitable anticoagulants (such as EDTA, sodium citrate, or heparin) should be selected according to the instructions for processing plasma samples.

Collection and storage:

Serum samples should be collected by centrifugation after natural coagulation at room temperature to avoid repeated freezing and thawing.

. Plasma samples should be centrifuged to collect the supernatant as soon as possible after collection, and repeated freezing and thawing should also be avoided. Cell culture supernatant and other biological samples also need to be centrifuged to remove particles and polymers before collecting the supernatant. If all samples cannot be tested immediately, they should be packaged and stored at -20 ℃ or -70 ℃ to avoid repeated freezing and thawing affecting the test results. Sample dilution: Some samples may need to be diluted according to the instructions to ensure that the detected concentration is within the quantitative range of the reagent kit.

II. Preparation and Storage of Reagents

Reagent Balance: After removing the reagent kit from the refrigerator, it should be equilibrated at room temperature for a period of time (such as 15-30 minutes) before use to ensure stable reagent performance.

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Reagent dilution: Some reagents (such as detergents, standards, etc.) need to be diluted according to the instructions.

. When diluting, the reagent and diluent should be accurately measured to avoid concentration deviation.

Reagent storage: Unused reagents should be stored according to the instructions to avoid spoilage or failure.

. Different batches of reagents must not be mixed.

III. Experimental Operation

Accurate Sample Addition: When using a sample applicator to add samples, it is important to ensure that the sample amount is accurate.

. When adding the sample, it should be placed at the bottom of the enzyme-linked immunosorbent assay plate well, avoiding touching the well wall as much as possible. Gently shake and mix well. Incubation time: Strictly follow the instructions for incubation time and temperature to ensure consistent incubation time for all reaction wells. During the incubation process, micro pores should be avoided from drying out. Thoroughly wash: When washing the enzyme-linked immunosorbent assay (ELISA) plate, the liquid in the well should be thoroughly drained to avoid residual liquid affecting the detection results. Insufficient washing can lead to a decrease in accuracy or an incorrect increase in OD value.

Avoid cross contamination: During the experiment, cross contamination should be avoided by using disposable suction tips and avoiding contact with micropores when replacing them.

. Meanwhile, different reagents should use different pipettes or containers.

Substrate should be kept away from light: The substrate color solution should be stored away from light, and subsequent operations should be carried out as soon as possible after adding the substrate to avoid the color being too dark and affecting the reading of the enzyme-linked immunosorbent assay.

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IV. Interpretation of Results and Waste Disposal

Interpretation of Results: The experimental results should be based on the reading of the enzyme-linked immunosorbent assay reader, and the sample concentration should be calculated according to the standard curve.

. If the OD value of the sample is higher than the OD value of the first well of the standard, it needs to be diluted with sample diluent before measurement, and the calculation should be multiplied by the total dilution factor.

Waste disposal: All samples, detergents, and waste should be treated as infectious agents to avoid polluting the environment.

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