Performance analysis of QDs-LFIAS detection
The main advantage of a lateral flow immunoassay system is
the integration of sample pre-treatment, separation, reaction and
detection in one strip. However, quantifying the resultant signal is
usually difficult, which restricts the utility of these assays. In this
study, samples were mixed with QDs–Ab, and both H9 (or H5)
subtype viruses in the sample and QDs–Ab moved forward to the
absorbent pad when added to the sample pad of the strip and
were captured by the immobilized capture antibodies in the test
line to form a sandwich structure (Fig. 1); the fluorescence signals
of QDs were measured by a handheld device (Fig. 1). Compared
with the broad application of gold nanoparticle-based lateral flow
immunoassay, our approach quantified the fluorescence intensity
of bound QDs on test line (Fig. 1) and consequently was able to measure the related virus concentration.
Performance analysis of QDs-LFIAS detectionThe main advantage of a lateral flow immunoassay system isthe integration of sample pre-treatment, separation, reaction anddetection in one strip. However, quantifying the resultant signal isusually difficult, which restricts the utility of these assays. In thisstudy, samples were mixed with QDs–Ab, and both H9 (or H5)subtype viruses in the sample and QDs–Ab moved forward to theabsorbent pad when added to the sample pad of the strip andwere captured by the immobilized capture antibodies in the testline to form a sandwich structure (Fig. 1); the fluorescence signalsof QDs were measured by a handheld device (Fig. 1). Comparedwith the broad application of gold nanoparticle-based lateral flowimmunoassay, our approach quantified the fluorescence intensityof bound QDs on test line (Fig. 1) and consequently was able to measure the related virus concentration.
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