Ray H. Liu

"Under normal circumstances, a test specimen is reported as "negative" when the response of the analyte is absent. However, if the intensity of the internal standard (IS) is low, indicating interference factors, the test could be considered "inconclusive." A quantitative hypothesis, A = (RxIxS)/L, serves as the "cutoff" for the acceptable signal-to-noise (S/N) ratio for the IS in making "negative/inconclusive" decisions, where A: acceptable S/N ratio...