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Parts per Trillion

Known as: Part Per Trillion, [pptr], pptr 
A unit of proportion equal to 10E-12.
National Institutes of Health

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Clinical Data Interchange Standards Consortium Terminology

Papers overview

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2016
2016
PLANETARY SCIENCE. Mars orbiter to sniff for methane.
Europe and Russia are set to launch a joint mission to Mars, as early as 14 March. Upon arrival in October, the Trace Gas Orbiter… 
Review
2004
Review
2004
Environmental and Toxicological Concerns of Dental Amalgam and Mercury
An evaluation of mercury emission estimates from dental sources indicates that reported emissions have been significantly… 
2004
2004
Breath Analysis Using Photoionization Mass Spectrometry
Abstract : REMPI (Resonantly Enhanced Multi Photon Ionization) is an ultra-sensitive analytical technique based on the unique… 
2004
2004
Investigation of inductively coupled plasma as an atomization source for analytical and fundamental measurements using cavity ringdown spectroscopy
1998
1998
Removal of mercury from contaminated groundwater to part per trillion levels
ADA has developed a process for removing mercury from contaminated groundwater and has demonstrated a pilot-scale version of this… 
1995
1995
Feasibility of screening large aqueous samples for thermally unstable pesticides using high efficiency packed column supercritical fluid chromatography with multiple detectors
SummaryNearly 100 pesticides were eluted with good peak shapes from silica columns using methanol/carbon dioxide mobile phases… 
1993
1993
Cytogenetic studies in lymphocytes of workers exposed to 2,3,7,8-TCDD
SummaryChromosome aberrations and sister chromatid exchanges (SCEs) were evaluated in 27 workers with current 2,3,7,8… 
1985
1985
Quantitative secondary ion monitoring gas chromatography/mass spectrometry of diethylstilbestrol in bovine liver.
A procedure is described for the extraction of diethylstilbestrol (DES) from animal tissue for quantitative capillary gas… 
Review
1985
Review
1985
Assessment of carcinogen exposure in man.
The statistical evidence that much human cancer has an environmental aetiology has led to a search for causative agents. Whilst… 
1977
1977
Clean-up techniques for the determination of parts per trillion residue levels of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD).
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