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In the current virus infection and pandemic situation, the extremely convenient gold nanoparticles sensor
(AuNPs) dependent antibody & antigen detection kits are very important assays for infection detection. Various laboratories
& manufactures across the globe are utilizing different kits development & manufacturing process but development of kits
and large scale manufacturing are two different things. A manufacturing process needs to be controlled for financial, quality
and regulatory compliance. The best way to control the process is by statistical method. The process produces products that
contain variables as critical quality attributes (dependent variables) are predicted over the processing time. There are distinct
immune –chromatographic point to care diagnosis devices and kits available with different quality attributes like antigenantibody proteins, aptamers, markers (nanoparticles, latex beads, and fluorescence) and devices performance attributes etc.
Such attributes add uncertainty to the durability of such instruments. The gold nanoparticles are one of key attribute, which
certainly defines the performance of kits (sensitivity, specificity and uniformity). To establishing the manufacturing process
capability, the static tolerance intervals are critical for the synthesis of gold nanoparticles, protein conjugation and
nitrocellulose membrane coating. . In the immune test kits, critical process parameters (independent variable) that affect
dependent responses can be controlled statistically by fitting purpose methodology. The manufacturing process is to be
established in the state on engineering control by setting up the critical process parameters. Statistically, the manufacturers
can predict and handle out-of-specification (OOS) results even if the process is inconsistent and unstable. This article
provides scientific tools to the reader to determine whether or not a gold nanoparticles based immune-chromatographic
development process is statically capable for scale-up.
Designing ultra-small nanostructured lipid carriers: critical process parameters
