The He-PDPID can detect permanent gases, volatile inorganics and other compounds which give little or no response with the flame ionization detector (FID) and has significantly better limits of detection (minimum detectable quantities (MDQs) in low picogram range) than can be achieved with a thermal conductivity detector (typically not lower than 1 ng).
A preliminary study by Fish (1968) found very low levels of Cu (often below detection limits) in stream water and small, but detectable, quantities of Cu in fine-particulate debris.
Using CE MS/MS, detectable quantities of HQNO were observed from a biofilm extract; our lack of detection of this compound by MALDI and SIMS may indicate that HQNO is localized below the MALDI and SIMS sampling depth within the biofilm, or that low levels (below our MSI detection limits) are uniformly distributed on the surface.
Roughly half of the batteries analyzed contain detectable quantities of Hg (52%) and V (56%).
Supercritical conditions were shown to be necessary to produce detectable quantities of products.
A key characteristic of these isotopes is that they are produced in detectable quantities in only the first few metres below Earth's surface.
These days the police hardly concern themselves with such cases, but at the time the possession of even barely detectable quantities of controlled drugs was a more serious matter.
As a result technetium, element number 43, and promethium, 61, are always radioactive (and are not found naturally in detectable quantities).
When the electrolyte contained MPA, the extended potential holding procedure resulted in significant roughening of the electrode with no detectable quantities of Au in the electrolyte.
It appears particularly clearly in inert solvents such as benzene, in which catalysis by molecular acids and bases is frequently observed despite the absence of detectable quantities of ions derived from the solvent.
Inductively coupled plasma-mass spectrometry investigation indicates that all batteries analyses contain Ni, Cu, As, Sr, and Ba and most of the batteries have detectable quantities of Pb (92%), Cr (88%) and Co (88%).
