detection limit


Also found in: Acronyms, Encyclopedia, Wikipedia.

detection limit

The smallest flow of sample into the source of the mass spectrometer, or the lowest partial pressure of sample gas that gives a signal, which can be distinguished from background noise, typically at a signal-to-noise ratio of 3 (the limit of quantitation is usually higher).
References in periodicals archive ?
In this section, we discuss the effect of the naive imputation method on the geometric mean in the presence of a detection limit. Let X be a positive random variable and [delta] be the lower detection limit; X is unobservable (missing) if X < [delta].
The required sensitivity for low strength and moderate toughness steel pipelines is within many ELI tool defect detection capabilities, but the required detection limits for higher strength and lower toughness pipes and very short or very deep crack defects represent a technology development challenge.
The linear regression equation ( y is ratio of peak area of the component to that of the internal standard, x is concentration), linear correlation coefficient, the linear range, the detection limits as well as limits of quantification (LOQ) of rutin and quercetin are given in Table-1.
coli on fingertips was measurable above the detection limited beyond six hours when transferred from -- menus.
In such cases, the speed of detection can save a patient's life, but the significance of low detection limit and high specificity can't be overlooked, either.
The extremely low detection limit of the new assay indicates that environmental samples, which may contain cell culture inhibitory substances and are routinely subjected to crude separation steps such as low-speed centrifugation before analyses, can be diluted by several orders of magnitude to dilute inhibitors while maintaining the viral load at detectable levels.
More recently, detection limits for selected Aroclors determined by liquid-liquid partitioning followed by headspace solid-phase microex-traction and gas chromatography atomic emission detection are reported as 0.5 mg/L to 1 mg/L [4].
It turns out to be quite a lot - 1.5 kilograms of brain or spinal cord from a cow with BSE just below the detection limit. Researchers writing in the Lancet medical journal said it was highly unlikely that anyone would consume this amount of beef nerve tissue today.
Online version of the TOC-Vc Series Analyzers is equipped with a detection limit of 4 ppb and measurement capability up to 25,000 ppm.
The lab found no detectable trans fats in any of the samples, with a detection limit of 0.01 percent of the sample weight.

Full browser ?