AGDB measured parameter: Gd_ppm

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

Parameter	Description
Gd_ppm_AES_HF	Gadolinium, in parts per million by weight, by inductively coupled plasma-atomic emission spectroscopy after HF-HCl-HNO3-HClO4 digestion
Gd_ppm_AES_HF_REE	Gadolinium, in parts per million by weight, by inductively coupled plasma-atomic emission spectroscopy after HF-HCl-HNO3-HClO4 digestion, REE package
Gd_ppm_ES_Q	Gadolinium, in parts per million by weight, by quantitative direct-current arc emission spectrography
Gd_ppm_ES_SQ	Gadolinium, in parts per million by weight, by semi-quantitative visual 6-step or direct reader direct-current arc emission spectrography
Gd_ppm_GV_CR	Gadolinium, in parts per million by weight, by gravimetric classic rock analysis
Gd_ppm_MS_HF	Gadolinium, in parts per million by weight, by inductively coupled plasma-mass spectroscopy after HF-HCl-HNO3-HClO4 digestion
Gd_ppm_MS_ST	Gadolinium, in parts per million by weight, by inductively coupled plasma-mass spectroscopy after Na2O2 sinter digestion
Gd_ppm_MS_ST_REE	Gadolinium, in parts per million by weight, by inductively coupled plasma-mass spectroscopy after Na2O2 sinter digestion, REE package
Gd_ppm_NA	Gadolinium, in parts per million by weight, by neutron activation
Gd_ppm_WDX_Fuse	Gadolinium, in parts per million by weight, by wavelength-dispersive X-ray fluorescence spectroscopy after LiBO2 or LiBO2-Li2B4O7 fusion