A COMPARISON AMONG NINE CANADIAN LABORATORIES OF DITHIONITE-, OXALATE-, AND PYROPHOSPHATE-EXTRACTABLE Fe AND Al IN SOILS

1974 ◽  
Vol 54 (3) ◽  
pp. 293-298 ◽  
Author(s):  
M. D. WEBBER ◽  
J. A. McKEAGUE ◽  
A. T. RAAD ◽  
C. R. DeKIMPE ◽  
CHANG WANG ◽  
...  
Keyword(s):  
Atomic Absorption ◽  
Close Agreement ◽  
Soil Samples ◽  
Atomic Absorption Analysis ◽  
Absorption Analysis ◽  
Poor Agreement ◽  
Colorimetric Analysis ◽  
Standardize Laboratory ◽  
Laboratory Procedures ◽  
Absorption Measurements

The results of two studies are reported: (1) a comparison of colorimetric and atomic absorption measurements of Fe and Al in dithionite, oxalate, and pyrophosphate extracts of soils; and (2) a comparison among nine Canadian laboratories of measurements of dithionite-, oxalate-, and pyrophosphate-extractable Fe and Al in six soils. Colorimetric and atomic absorption analyses gave the same measurements of Fe and Al in dithionite, oxalate, and pyrophosphate extracts of soils. Data reported by six Canadian laboratories showed close agreement; data reported by three laboratories showed poor agreement, indicating a need for reference soil samples containing known amounts of extractable Fe and Al to standardize laboratory procedures. Atomic absorption analysis of the extracts is much more rapid than colorimetric analysis and details of the atomic absorption methods are appended.

Simultaneous Multielement and Multiline Atomic Absorption Analysis Using a Computer-Coupled Photodiode Array Spectrometer

1975 ◽  
Vol 29 (2) ◽  
pp. 167-170 ◽  
Author(s):  
Gary Horlick ◽  
Edward G. Codding
Keyword(s):  
Absorption Spectrum ◽  
Atomic Absorption ◽  
Atomic Absorption Analysis ◽  
Absorption Analysis ◽  
Measurement Systems ◽  
System A ◽  
Photodiode Array ◽  
Lamp Source ◽  
Spectrometer System ◽  
Absorption Measurements

Development of simultaneous multielement atomic absorption analysis has been hampered by a lack of effective multichannel spectrochemical measurement systems. In this study a computer-coupled photodiode array spectrometer is applied to atomic absorption measurements. Using a multielement hollow cathode lamp source and this spectrometer system, a complete “atomic absorption spectrum” can be measured over a range of 130 Å. Both quantitative and qualitative absorption information can be simultaneously acquired for lines of several elements and several lines of one element. Results are presented for multiline atomic absorption of Cr and multielement atomic absorption of Ni and Cr, and Cr and Fe.

Some applications of the Zeeman effect to atomic absorption analysis

1979 ◽  
Vol 30 (6) ◽  
pp. 708-710 ◽  
Author(s):  
E. L. Al'tman ◽  
A. A. Ganeev ◽  
Yu. I. Turkin ◽  
S. E. Sholupov
Keyword(s):  
Atomic Absorption ◽  
Zeeman Effect ◽  
Atomic Absorption Analysis ◽  
Absorption Analysis

Histochemical Demonstration of Copper and Copper-Associated Protein in the Canine Liver

1985 ◽  
Vol 22 (4) ◽  
pp. 327-332 ◽  
Author(s):  
L. P. Thornburg ◽  
M. Beissenherz ◽  
M. Dolan ◽  
M. F. Raisbeck
Keyword(s):  
Atomic Absorption ◽  
Histochemical Demonstration ◽  
Atomic Absorption Analysis ◽  
Absorption Analysis ◽  
Tissue Sections ◽  
Histochemical Methods ◽  
Histochemical Detection ◽  
Rubeanic Acid ◽  
Copper Detection

Three different histochemical methods for copper detection were compared. Atomic absorption analysis was used to substantiate the tissue stains. There was good correlation between rhodanine staining and rubeanic acid-stained tissue sections. The orcein reaction for copper-associated protein did not consistently correlate with the methods demonstrating copper. Prolonged staining (72 hours) with rubeanic acid more consistently and clearly detected increased copper in canine livers than did staining with rhodanine. Seventy-two hour staining with rubeanic acid is the method of choice for histochemical detection of copper in canine liver.

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