Metal Analysis by Gas Chromatography of Chelates of Heptafluorodimethyloctanedione

The negative Ion chemical ionization mass spectra for 34 volatile metal chelates are reported. Also a sensitivity study using a gas chromatograph chemical Ionization mass spectrometer computer system comparing detection limits for several Cr(/3-dlketonates)3 in both negative and positive Ion detection modes is described. This study Illustrates the ability of negative ion chemical ionization mass spectrometry to provide two to three orders of magnitude Increase In specific Ion currents for compounds containing electronegative functional groups.Chemical ionization mass spectrometry has been shown to be a potentially sensitive method of analysis for trace metals (1-4). Detection limits in the picogram range have been reported for several of the first, second, and third row transition metals (4). This earlier work used the more

Section: Methodsmentioning

confidence: 99%

Negative ion chemical ionization mass spectrometry of volatile metal chelates

Prescott¹,

Campana²,

Risby³

1977

“…( 6) D. L. Simmons, R. J. Ranz, H. S. L. Woo, and P. Picotte, J. Chromatogr.. 43, 141 (1969). method is low (1), and the diatomaceous earth column "classical" liquid chromatographic method (DECLC) is time consuming (12). The application of high-pressure liquid chromatography (HPLC) to the analysis of TC is preferred over other analytical methods because of its high speed and superior sensitivity.…”

Section: Methodsmentioning

confidence: 99%

“…The possibility that this method of analysis could be applied to oxide samples without preliminary fusion or dissolution steps was raised by the observation (12) that 1,1,1,2,2,3,3-heptafluor o-7,7-dimethyl-4,6-octanedione, H(fod), could quantitatively dissolve BeO in 2 hours at 170 °C. Analytical procedures of some complexity have been published for the chelation-gas chromatography of beryllium in terrestrial, meteoric, and lunar rocks and in beryllium oxide rocket exhaust (13).…”

mentioning

confidence: 99%

Trace determination of beryllium oxide in biological samples by electron-capture gas chromatography

Frame¹,

Ford²,

Scribner³

et al. 1974

“…The use of the nitrous oxide-acetylene flame for the atomic absorption deter- Method: Material (References) y Activation: Hf (549) X-ray absorption: U, Nb, Zr (699) X-rav absorntion: ores and concentrates (612) &lass spectrographic: study of method (Id, 338); gallium (222); ruby (696) X-ray absorption: U, Zr (699) X-ray absorption: ores and concentrates (612) Electron beam microprobe: study of detection limits (76) &ray backscattering; ores, slags (333); steel (334) Thermometric: slags (664) Gas chromatography: study of chelates (713) Mass spectrographic: study of sensitivity (338); A1 Electron beam microprobe: study of detection limits Microbiological: study of conditions (539) Thermometric: Co (663) Mass spectrographic: nuclear fuels (480) X-Rav absorDtion: Sn (611 ) General analytical chemistry (260) Analysis of tantaloniobates and tantalotitanates (386) Determination in steel (488) Impurities in germanium (626) Impurities in semiconductor compounds (251) Impurities in bismuth (500) Impurities in lead (95) Inipurities in germanium (526) Impurities in sulfur (19) Chromium i M oly bdenum Comparison of methods (676) Trace constituents in soils (93) Impurities in bismuth (500) Impurities in lead (96) Tungsten…”

Section: Molybdenummentioning

confidence: 99%

Nonferrous metallurgy. II. Zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, and tungsten

Bachman¹,

Banks²

1969

HIS REVIEW, as did the previous two Alizarin red S: ceramic materials (387); alkali hydroxides (253); Zr-Ni alloys (692) Pyrocatechol violet: steel (733); HpSO4 solution (787, 799 Zirconin (Gallocyanine MS) : hlg, Al, Ni, Cu (613); Nb, Mo, Fe, Sn, Ti (516) Stilbazogall 11: study of complex (154): Me: (616) study of complex (515); Chromeaxurol S: stidy of cchditions'(302)-' Chloranilic acid: study of conditions (336) Methylthymol blue: study of complex (751) Chlorosulfophenol S: study of conditions (665) p-Chloromandelic acid: study of conditions (381 ); Phenylfluorone: Ta (628) Robinetin: study of conditions (355) Alberon: Cu (514) Thorin: study of conditions (658) n'-methylanabasine-a'-azoresorcinol : study of conditions N-methylanabasine-a'-azc-p-naphthol: study of condi-3',4',7,RTetrahydroxyflavonol: study of conditions Cyanoformazan-2: study of conditions (421) N-phenylbenzohydroxamic acid: Nb (688) Molybdosulfatozirconic acid: study of conditions (273) 3',4',5',6'-Tetrahydroxyfluoran: study of reactions (604) 1,l'-Dihydroxyazo dyes: study of reactions (394) Azo dyes: comparison of reagents (396) Review of spectrophotometric methods (286, 567, 646, H202: Ti (753); iron ore (163) Molybdovanadophosphate: study of conditions (386), Phosphovanadotungstate: A1 (388), TiC14 (754), coal Borax bead: study of method ( 5 ) 4-(2-Pyridylazo)-resorcinol: study of conditions and interferences (13, 131, 236, 358, 690), crude oil (697) 4-(2-Pyridylazo)-resorcinol-HzOz: study of complex (689) Xylenol orange: study of complex (14, 18, @I), water Methylthymol blue: study of complex (761); Ti (752) Chrome azurol S: study of complex and interferences VOL. 41, NO. 5, APRIL 1969 1 1 3 RTable 1. Spectrophotometric Methods (Cont'd.)Vanadium (Cont'd.) N-(o-tolyl)-benzohydroxamic acid: study of conditions Element Reagent: Material (References) and interferences (467); silirate rocks (332) Salicylhydroxamic acid: biological materials (428) N-Phenylcinnamohydroxamic acid: Fe, U (812) 'V-Phenyl-2-furohydroxamic acid: brines (583); steels N-Phenyl-p-phenylazobenzohydroxamic acid: study of Caprohydroxamic acid: study of conditions (602) Arsenazo I: stitdy of Conditions (457) Gossipol: study of conditions and interferences (363) hlorin: study of conditions and interferences (390) Ferron: ores (469) Azoxine S: study of conditions and interferences (261) Thenoyltrifliioroacetone: study of conditions (311) Cyanoformazan-2 : ore concentrate (819); heat-resistant Formazon : Ti concentrate (41 1 ) Srilfosalicyclic acid: study of conditions and interferences Salicylaldehyde: study of conditions and interferences Salicylaldehyde-anthranilic acid: steel (62) Nicotinic acid hydrazide: study of conditions (412) p-Anisidine: study of conditions and interferences 3-Hydroxyflavone: study of extractants (391) Pyridine-2,6-dicarboxylic acid-Ht02: study of conditions Element Reagent: Material (References) Niobium (Cont'd.) Tantalum Chromium Molybdoniobophosphate: NblO; (809); A1 (388); steel Chlorosulfophenol S: study of complex (115, 666) Cyanoformazan-2:...