AGDB measured parameter: Ir_ppm_NA

Iridium, in parts per million by weight, by neutron activation

Reference for the analytical method

Author Taggart, Joseph E., editor
Year 2002
Title Analytical methods for chemical analysis of geologic and other materials, U.S. Geological Sur
Series U.S. Geological Survey open-file report 02-223
URL http://pubs.usgs.gov/of/2002/ofr-02-0223/
Notes Title from PDF title screen (viewed on Oct. 21, 2003). Updates Open-file report 96-525. Includes bibliographical references. Mode of access: Internet. System requirements: Adobe Acrobat Reader (available free).
Organization USGS-BGC

Other parameters measuring Ir

Parameter Description
Ir_ppm_ES_SQ Iridium, in parts per million by weight, by semi-quantitative visual 6-step or direct reader direct-current arc emission spectrography
Ir_ppm_FA_ES Iridium, in parts per million by weight, by PbO fire assay and quantitative direct-current arc emission spectrography
Ir_ppm_FA_MS Iridium, in parts per million by weight, by NiS fire assay and inductively coupled plasma-mass spectroscopy
Ir_ppm_NA Iridium, in parts per million by weight, by neutron activation