Atomic Absorption Spectrometry with Absorption Tube Technique

1975 ◽  
Vol 29 (1) ◽  
pp. 58-63 ◽  
Author(s):  
Tetsuo Uchida ◽  
Chuzo Iida
Keyword(s):  
Detection Limit ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Memory Effect ◽  
Detection Limits ◽  
Absorption Spectrometry ◽  
Absorption Tube ◽  
External Heating ◽  
Manganese Copper ◽  
Sensitivity Detection

In atomic absorption spectrometry with the long absorption tube using a hydrogen-air flame and ring burner, the various effects such as the external heating of the tube, rate of exhaust of the burnt gas, and preheating of the aspirating air on the sensitivity, detection limit, and memory effect for 24 elements were studied. The optimal flame conditions were appreciably affected by the rate of exhaust of burnt gas. Preheating of the aspirating air resulted in 3 to 10% enhancement in sensitivity for silver, zinc, and antimony. By external heating of the tube, more than 40% enhancement in sensitivity was obtained for manganese, copper, gallium, silver, antimony, and bismuth. The detection limits were also lowered considerably for gallium, tin, antimony, mercury, and bismuth.

scholarly journals Influence of Digestion Procedure and Residual Carbon on Manganese, Copper, and Zinc Determination in Herbal Matrices by Atomic Absorption Spectrometry

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Dorota Adamczyk-Szabela ◽  
Piotr Anielak ◽  
Wojciech M. Wolf
Keyword(s):  
Reference Material ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Certified Reference Material ◽  
Hydrofluoric Acid ◽  
Absorption Spectrometry ◽  
Residual Carbon ◽  
Spectral Determination ◽  
Copper And Zinc ◽  
Manganese Copper

Mineralization to the complete oxidation of sample carbon component does not always assure the best analyte recovery. Particular attention should be paid to the presence of silicon in the investigated plant sample and especially in the certified reference material for which Si content is scarcely given by the providers. During mineralization without addition of the hydrofluoric acid, the residual carbon may block silica surfaces and increase availability of an analyte for its spectral determination in the solution. This issue is of particular relevance because standard protocols for digestion of plant matrices often do not support hydrofluoric acid addition. Several procedures recommended for decomposition of herbal plants were applied for the respective certified reference material and examined in detail. Manganese, copper, and zinc contents were analyzed in all samples by the flame atomic absorption spectrometry. Additionally, the residual carbon was determined in all mineralizates. Silicon content was analyzed by the X-ray fluorescence method. The best recoveries were observed for samples characterized by relatively high residual carbon.

scholarly journals Evaluation of the Memory Effect on Gold-Coated Silica Adsorption Tubes Used for the Analysis of Gaseous Mercury by Cold Vapor Atomic Absorption Spectrometry

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Mohammad Mahmudur Rahman ◽  
Richard J. C. Brown ◽  
Ki-Hyun Kim ◽  
Hye-On Yoon ◽  
Nhu-Thuc Phan
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Memory Effect ◽  
Elemental Mercury ◽  
Absorption Spectrometry ◽  
Atomic Fluorescence Spectrometry ◽  
Gaseous Species ◽  
Cold Vapor ◽  
Gaseous Elemental Mercury ◽  
Cold Vapor Atomic Absorption

In an effort to reduce the experimental bias involved in the analysis of gaseous elemental mercury (Hgo), the blank response from gold-coated adsorption tubes has been investigated using cold vapor atomic absorption spectrometry (CVAAS). Our study has been compared with our recent investigation on memory effect in a cold vapour atomic fluorescence spectrometry (CVAFS). The pattern of blank responses was quantified after loading different amounts of mercury and after different time intervals of 1, 14, and 45 days. In case of the one day interval, the result of five to six instant blank heating cycles confirmed successful liberation of mercury following the second and third blank heating cycles. The results of 14 or 45 days generally suggest that liberation of excess mercury is affected by both the initial loading amount and the length of storage time prior to analysis. We have demonstrated a possibly effective way to reduce memory effects. Some similarities of these results with those from CVAFS experiment suggests that the blank response is caused by a combination of mercury absorbed within the bulk gold and micro- and nanoparticles liberated during heating and not from coabsorbing interfering gaseous species.

PIXE MEASUREMENT OF THE CADMIUM CONTENT IN ANIMAL TISSUES

1992 ◽  
Vol 02 (03) ◽  
pp. 397-403 ◽  
Author(s):  
LE HUONG QUYNH ◽  
I. DEMETER ◽  
K. HOLLÓS-NAGY ◽  
Z. SZŐKEFALVI-NAGY
Keyword(s):  
Detection Limit ◽  
Atomic Absorption Spectrometry ◽  
Trace Element ◽  
Atomic Absorption ◽  
Absorption Spectrometry ◽  
Rabbit Liver ◽  
Cadmium Content ◽  
Animal Tissues ◽  
Element Concentrations ◽  
Thin Samples

PIXE measurements were performed on thin samples prepared from different rabbit liver, kidney, muscle and bone tissues. The trace element concentrations obtained were compared to those measured by atomic absorption spectrometry. The PIXE detection limit for Cd was found to be 0.7 ppm.

Free Atom Production in a Stabilized dc Arc Device for Atomic Absorption Spectrometry

1971 ◽  
Vol 25 (3) ◽  
pp. 319-324 ◽  
Author(s):  
M. Marinković ◽  
T. J. Vickers
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Detection Limits ◽  
Absorption Spectrometry ◽  
Free Atom ◽  
Dc Arc ◽  
Potassium Addition

A long-path stabilized dc arc device is described, and the results of an investigation of free atom production with this device reported. In all the measurements reported samples were introduced to the arc as solution aerosols. In evaluation of the arc the following aspects were examined: (1) the effect of current, (2) the effect of potassium addition, (3) the effect of hydrocarbon addition. Radial absorbance measurements are reported for Mg, Al, and W. Atomic absorption detection limits are reported for Al, B, Mg, V, and W.

Effects of Air-Acetylene Flame Parameters on Simultaneous Multielement Atomic Absorption Spectrometry

1982 ◽  
Vol 36 (6) ◽  
pp. 637-643 ◽  
Author(s):  
James M. Harnly ◽  
Jean S. Kane ◽  
Nancy J. Miller-Ihli
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Detection Limits ◽  
Absorption Spectrometry ◽  
United States Geological Survey ◽  
National Bureau ◽  
Optimal Parameters ◽  
Continuum Source ◽  
Normal Ranges ◽  
Analytical Accuracy

The effects of the air-acetylene ratio and the observation height on the detection limits and analytical accuracy of 11 elements (Ca, Co, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, and Zn) determined by simultaneous multielement atomic absorption spectrometry with a continuum source (SIMAAC) were investigated. Determinations were made at four observation heights and five airacetylene ratios evenly spaced over normal ranges for these variables. For the 11 elements, detection limits and characteristic concentrations varied by factors of 1.5 to 25. The best compromise detection limits were obtained at observation heights low in the flame and with richer flames. The variations of the analytical recoveries for Co, Cr, Cu, Fe, K, Mg, Na, and Zn determined in a National Bureau of Standards (NBS) standard reference material (SRM) and two United States Geological Survey (USGS) standard rocks as a function of the flame parameters were relatively insignificant. Significant variations were observed for Ca and Mg, whereas the concentration of Ni was too low to permit any conclusions. The optimal, compromise flame parameters, for analytical accuracy, were the two lowest observation heights in lean flames when all elements except Ca and Mg were determined. Inclusion of Mg shifted the optimal parameters to a higher observation height. Four NBS SRM's and three USGS standard rocks were analyzed weekly, over a 7-week period, at a low observation height in a lean air-acetylene flame. In general, accuracies within ±5% of 100% and precisions of ±5% were obtained for Co, Cr, Cu, Fe, K, Mn, Na, and Zn. Acceptable recovery (100% ± 5%) for Ca could only be obtained with a large dilution of the sample into a 0.5% La matrix.

Estimating and comparing the detection limits in atomic-absorption spectrometry

1975 ◽  
Vol 23 (4) ◽  
pp. 1295-1300 ◽  
Author(s):  
B. V. L'vov ◽  
D. A. Katskov ◽  
L. K. Polzik ◽  
L. P. Kruglikova
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Detection Limits ◽  
Absorption Spectrometry
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