If you're a student or researcher, you might have encountered situations where your samples weren't stored properly and now you're worried about the accuracy of your ELISA results. Today, we’re going to walk you through how improper storage can affect your experiments and what steps you can take to avoid common pitfalls.
Improper storage of biological specimens, especially in refrigerators, can lead to serious issues. For example, IgG in serum may polymerize into multimers, while AFP can form dimers. These changes can cause excessive background signals or even false positives in indirect ELISA assays. Additionally, if the sample is left for too long—more than a day—the immunological activity of antigens or antibodies might decrease, leading to false negatives. To prevent such problems, it's best to use freshly collected serum samples for ELISA testing.
If immediate testing isn't possible, serum samples should be stored at 4°C for up to 5 days. For longer-term storage, cryopreservation at -20°C or -80°C is recommended. However, when thawing frozen samples, keep in mind that proteins may become partially concentrated or unevenly distributed. It’s important to mix the sample gently after thawing, avoiding vigorous shaking, which could damage the integrity of the sample.
At Shanghai Xinfan Bio, we understand the importance of proper sample handling. That’s why we offer high-quality ELISA kits and other reagents to support accurate and reliable results. Some of our ELISA kits are available from stock, so feel free to reach out for more information.
Our main product lines include:
- **ELISA Kits**: Both imported and domestic options, covering human, rat, and mouse samples.
- **Culture Media**: Including microbial, chromogenic, BD, and Gibco media.
- **Serum**: Fetal bovine serum, human serum, animal serum, and brands like NQBB and Hyclone.
- **Biological Reagents**: From well-known suppliers like Amresco, Sigma, and Abcam.
- **Reference Substances**: Imported standards and reference materials.
- **Antibodies**: Primary, secondary, and flow cytometry antibodies.
- **Radioimmunoassay Kits**: Both imported and domestic options, including American Phoenix brand.
- **Laboratory Services**: Radioimmunoassay, Western Blot, Immunohistochemistry, qPCR, and more.
Whether you're working in a research lab or a clinical setting, we're here to help you get the right tools and support for your experiments. Let us know how we can assist you today!
Capacitor leakage current test power supply is aimed at the diversity of output voltage and frequency required for different capacitance tests with the DC output voltage up to 3000Vdc, the AC voltage output up to 200Vac, the AC current up to 500A, and the output frequency can be selected according to customer requirements from 50Hz to 100KHz.
Equipped with special high-frequency and high-temperature fixtures and connecting wires for capacitor leakage current testing, the capacitor leakage current test power supply can imitate the actual working conditions of capacitors to determine the service life of a group of capacitors under test, providing the accurate parameters of capacitors required by the manufacturer for the capacitors R&D and quality inspection test, the power supply is now aiding the test of high-frequency and high-current passive devices such as high-frequency capacitors, film capacitors, electrolytic capacitors, ballast capacitors, and ballast inductors.
Capacitor Leakage Test Power Supplies
The ADP series capacitor leakage test power supply is specially designed and customized for capacitor manufacturers` product quality control process or users of capacitors for capacitor ripple current durability life test.
Capacitor leakage current test power supply is aimed at the diversity of output voltage and frequency required for different capacitance tests with the DC output voltage up to 3000Vdc, the AC voltage output up to 200Vac, the AC current up to 500A, and the output frequency can be selected according to customer requirements from 50Hz to 100KHz.
Equipped with special high-frequency and high-temperature fixtures and connecting wires for capacitor leakage current testing, the capacitor leakage current test power supply can imitate the actual working conditions of capacitors to determine the service life of a group of capacitors under test, providing the accurate parameters of capacitors required by the manufacturer for the capacitors R&D and quality inspection test, the power supply is now aiding the test of high-frequency and high-current passive devices such as high-frequency capacitors, film capacitors, electrolytic capacitors, ballast capacitors, and ballast inductors.
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