In in vitro diagnostic immunoassays, researchers often encounter persistent challenges such as elevated background signals, erratic test results, and discrepancies between detected values and actual sample conditions. Despite repeated troubleshooting, the root cause often remains elusive—suggesting the presence of interfering substances that can skew measurements. This represents a common pain point in immunoassay reagent development. The introduction of high-performance blocking agents offers an effective solution to neutralize these interferences, enabling developers to tackle the problem at its source and improve assay accuracy and robustness. Cnpair offers high-performance blocking reagents that deliver potent anti-interference effects with only a small dosage.
Why False Positives Persist Despite Repeated Efforts
In immunoassay experiments, multiple factors can cause interference. One of the core reasons for detection errors and false positives is the presence, within the sample, of a large number of interfering substances that are chemically distinct from the target analyte but can still bind to the reagent’s antigen or antibody components. Common interfering substances include heterophilic antibodies (HA), human anti-animal antibodies (HAAA, such as HAMA), autoantibodies, rheumatoid factor (RF), as well as various proteins and conditions like jaundice.
Let’s look at the classification and principles of blocking reagents. They are mainly divided into active blocking reagents and passive blocking reagents.
Cnpair Related Products
At 100 microgram per milliliter, we achieve over 98% blocking efficiency against HAMA1 and RF, and 85% for HAMA2.
For TP assays on the chemiluminescence, it dramatically reduces false positives and enhances diagnostic accuracy.
Cnpair blocking reagents demonstrate excellent blocking efficacy against both HAMA and RF, featuring low dosage requirement, high efficiency, and broad-spectrum performance. We are dedicated to the independent R&D and large-scale production of in vitro diagnostic raw materials. Our products offer stable performance and strong batch-to-batch consistency, enabling customers to shorten product development cycles and reduce production costs. Customers with specific needs are welcome to contact our sales team at any time.
