Best Practices for Serum and Plasma Extraction for Using with ELISA
The accuracy and reliability of results in an ELISA depend heavily on the quality of the extracted serum or plasma. In this blog post, we will discuss the best practices for serum and plasma extraction for ELISA to ensure optimal sample quality and assay performance.
Guide to Serum and Plasma Extraction Methods
Use sterile collection tubes: Choose collection tubes specifically designed for serum or plasma collection. Sterility prevents contamination and ensures accurate results. (1)
Use proper collection needles: Select an appropriate needle gauge to minimize hemolysis and ensure smooth blood collection.
Prepare the patient or donor: Instruct the patient to fast or follow specific guidelines, if required, to minimize sample variability due to recent food intake or medication.
Identify the appropriate collection site: Venipuncture is the most common way to collect blood from adult study participants or patients. Collection takes place from a superficial vein in the upper limb, generally the median cubital vein in the arm. Choose a suitable venipuncture site, such as the antecubital vein, and clean the site thoroughly using an antiseptic solution to minimize the risk of contamination. (3)
Avoid excessive tourniquet application: Prolonged tourniquet application can result in sample hemolysis. Apply the tourniquet for only as long as necessary to visualize the vein and collect the required volume of blood.
When collecting blood, it is important to use the appropriate tubes, as some of them may be contaminated by the analytes you want to measure.
For those samples that will be frozen, it is recommended to use transfer tubes made of polypropylene with a screw cap.
The choice of the volume of the sample tube is determined by the analytical requirements and the quantitative analysis method. The methods often require different volumes of samples. Contact us to determine the tubes you will need.
In order to avoid contaminating your samples, please be careful when handling the material and the samples. Wearing nitrile gloves protects you from infections and also allows to reduce the risk of contaminating the samples. (2)
If serum and plasma samples need to be transported or shipped, ensure proper packaging and adherence to transportation regulations. Use appropriate packaging materials, such as insulated containers with temperature control options, to maintain the desired storage conditions during transit. Label the packages correctly and include necessary documentation to ensure compliance with shipping regulations.
Conclusion:
Following the best practices for serum and plasma extraction for ELISA is crucial for obtaining reliable and reproducible results. Proper sample collection, processing, and storage techniques, along with careful quality control and experimental considerations, are essential for ensuring optimal sample quality and accurate ELISA outcomes. By adhering to these best practices, researchers and clinicians can enhance the effectiveness and reliability of their ELISA experiments, leading to more accurate and meaningful data interpretation.
Learn more about our tips for sample preparation here: https://krishgen.com/elisa-sample-preparation-faqs/
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