Chris Riddle
University of Windsor
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Featured researches published by Chris Riddle.
Chemical Geology | 1976
A. Turek; Chris Riddle; B.J. Cozens; N.W. Tetley
Abstract The potentiometric Karl Fischer titration method has been adapted for the determination of combined water in chemical rock analysis. This procedure appears to be superior in accuracy, precision and rapidity over the well-established Penfield method. Determination of water in copper sulphate pentahydrate is at the theoretical limit within experimental error. We also report replicate determinations by both methods on five samples, including the international standard BCR-1.
Chemical Geology | 1977
G. Michael Bancroft; Tsun K. Sham; Chris Riddle; T. E. Smith; A. Turek
Abstract Room-temperature 57Fe Mossbauer spectra have been recorded for the USGS rock-standards G-2 and W-1; the CRPG standards GA and mica-Fe; and an “in-house” standard, NS. A comparison of the results of ferric/ferrous-Fe ratios by chemical and Mossbauer analysis is presented. The errors involved in each method are assessed. In the low-Fe rocks, chemical analysis appears to considerably over-estimate ferric content although the spread of individual laboratory values tend to a low limit close to the Mossbauer values.
Chemical Geology | 1978
A. Turek; Chris Riddle; Frank Talerico
Abstract The determination of CO2 by non-aqueous titration against sodium methoxide, using thymolphthalein indicator, has been applied to rock analysis. Replicate determinations are reported for CO2 in the international standards SY-2 and BCR-1, and in an “in house” standard, NS. Comparative data are also presented for the conventional volumetric and gravimetric methods. When the procedure is combined with the titrimetric method of chemical-water determination, using a split-flow technique, simultaneous determination of H2 O and CO2 may be effected.
Canadian Journal of Chemistry | 1975
John E. Drake; Chris Riddle; L. Coatsworth
Canadian Journal of Chemistry | 1976
John E. Drake; Chris Riddle; H. Ernest Henderson; Boris M. Glavinčevski
Inorganic Chemistry | 1978
John E. Drake; Chris Riddle; Boris M. Glavinčevski; Krystyana Gorzelska; H. Ernest Henderson
Canadian Journal of Chemistry | 1977
John E. Drake; Chris Riddle; H. Ernest Henderson; Boris M. Glavinčevski
X-Ray Spectrometry | 1977
Chris Riddle; T. E. Smith
Inorganic Syntheses, Volume 13 | 2007
John E. Drake; Chris Riddle; John R. Webster; William L. Jolly
Inorganic Syntheses, Volume 18 | 2007
John E. Drake; Bernard Rapp; Chris Riddle; Jim Simpson; Terrance Mazanac; Sheldon G. Shore