detection limit

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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 ?
With this new tandem GCMS technology (also known as GC/MS/MS or triple quadrupole GCMS), GC-ECD detection limits are possible.
Detection limit presents problems for statistical analysis since no data (or very little data) is observed in part of the potential range of the variable.
In the first approach, minimum detection limits are defined by the monitoring defect, and the standard deviation is defined by the difference between the monitoring and critical defects.
However, the baseline noise increased apparently when the applied voltage exceeded 25 kV, which can make the detection limits deteriorate.
Sensitivity is the key when low detection limits are the goal and the aurora Elite will be the enabler allowing trace elemental analysts to redefine their application boundaries.
They were able to achieve a 3-million-fold improvement in the detection limit by using small structures that could only be seen with a powerful electron microscope.
When the assay was tested with artificially contaminated food samples, the detection limit for each organism increased by a factor of 10 to 50 in most samples, but these were still much lower than the detection limits of a conventional Elisa.
Subsequent research will evaluate this protocol using different food matrices, such as fat, protein and carbohydrate, to determine if detection limits can be maintained.
Recent improvements in the technology combined with new reagents have reduced detection limits without increasing the total detection time.
When the amplifications were performed in the presence of cellular DNA extracted from PCR-negative liver, bursa, and spleen samples, the detection limits were respectively 20, 20, and 60 copies of genome per milligram of tissue.
This mass spectrometer is said to provide continuous analysis of evolving gases with unrivaled detection limits, according to the company.
Coupled with the VP100 vapour generation accessory, the iCE 3000 Series AA spectrometers are capable of reaching detection limits of 0.

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