scholarly journals Simulation Methods to Treat Some Factors Affecting Atomic Absorption measurements

2018 ◽  
Vol 34 (part1) ◽  
pp. 298-312
Author(s):  
Wafaa. Mousa ◽  
Amr. Khairat ◽  
Shereen. Mohamed
Keyword(s):  
Atomic Absorption ◽  
Simulation Methods ◽  
Factors Affecting ◽  
Absorption Measurements

Study of the width of the mercury line at ?=253.7 nm in a light source for atomic-absorption measurements

1977 ◽  
Vol 27 (3) ◽  
pp. 1214-1214 ◽  
Author(s):  
�. L. Al'tman ◽  
A. A. Ganeev ◽  
Yu. I. T�rkin ◽  
S. E. Sholupov
Keyword(s):  
Atomic Absorption ◽  
Light Source ◽  
Absorption Measurements

Distribution of Lead in Human Bone: I. Atomic Absorption Measurements

1990 ◽  
pp. 267-274 ◽  
Author(s):  
H. Hu ◽  
T. Tosteson ◽  
A. C. Aufderheide ◽  
L. Wittmers ◽  
D. E. Burger ◽  
...  
Keyword(s):  
Atomic Absorption ◽  
Human Bone ◽  
Absorption Measurements

Quantitative Determination of Cadmium in Water-Soluble Color Additives by Atomic Absorption Spectroscopy

1972 ◽  
Vol 55 (5) ◽  
pp. 1145-1149
Author(s):  
Lueangier Moten
Keyword(s):  
Aqueous Solutions ◽  
Quantitative Determination ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Quantitative Method ◽  
Water Soluble ◽  
Low Levels ◽  
Absorption Measurements

Abstract A quantitative method is presented for the determination of cadmium at low levels (5–20 ppm) in water-soluble color additives by atomic absorption spectroscopy. Absorption measurements were made on aqueous solutions of typical color additives to which known amounts of cadmium had been added. The method requires no pretreatment of sample and should be applicable to all water-soluble color additives.

Collaborative Study of a Zincon Ion Exchange Method for the Quantitative Determination of Zinc in Fertilizers

1971 ◽  
Vol 54 (4) ◽  
pp. 790-795
Author(s):  
C E Jones ◽  
L E Pracht
Keyword(s):  
Ion Exchange ◽  
Quantitative Determination ◽  
Atomic Absorption ◽  
Reference Data ◽  
Collaborative Study ◽  
Present Form ◽  
Exchange Method ◽  
Ion Exchange Method ◽  
Absorption Measurements

Abstract This collaborative study represents an attempt to validate the ion exchange zincon method for the quantitative determination of zinc in fertilizers. The values of the standard deviations Sd, Sr, and Sb and the results of the F- and t-tests are presented as an estimate of the precision, accuracy, and dependability. Atomic absorption measurements were also made and provided reference data for evaluation purposes. In its present form, the method falls short of expectations as an alternative wet approach to the dithizone method. It is recommended that the methods for determining zinc in fertilizers be studied further.

Allowance for nonselective spectral noise in atomic absorption measurements using a graphite cell

1968 ◽  
Vol 8 (2) ◽  
pp. 124-127
Author(s):  
B. V. L'vov ◽  
M. A. Kabanova ◽  
D. A. Katskov ◽  
G. G. Lebedev ◽  
M. A. Sokolov
Keyword(s):  
Atomic Absorption ◽  
Graphite Cell ◽  
Absorption Measurements

scholarly journals Measurement and Calculation of Electron Contamination for Radiotherapy Photon Mode

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Nahid Chegeni ◽  
Fakher Rahim ◽  
Marziyeh Tahmasbi ◽  
Zahra Farzanegan ◽  
Seyedeh Khadijeh Hosseini
Keyword(s):  
Web Of Science ◽  
Field Size ◽  
Simulation Methods ◽  
Factors Affecting ◽  
Simulation Techniques ◽  
Source Distance ◽  
Helium Gas ◽  
Reduction Methods ◽  
Air Column ◽  
Photon Path

Context: This study was done to review the electron contamination sources and measurement based on dosimetry and simulation techniques for radiotherapy and also investigate factors affecting electron contamination reduction. Methods: We systematically searched five major indexing databases, including PubMed, Scopus, Embase, ISI web of science, and Cochrane central, using keywords of electron contamination, electron contamination AND measurement, electron contamination AND simulation, and electron contamination AND reduction until Dec 2020. Results: Overall, 35 studies were reviewed, including articles reporting the theory of electron contamination, papers on dosimetry methods to measure electron contamination, studies about simulation methods to assess electron contamination, and articles about reducing electron contamination. The results indicated an increase in electron contamination using a flattering filter, an increase in field size, the presence of prosthesis in the patient's body, and a rise in photon energy. Conclusions: It can be concluded that the excessive delivered doses by electron contamination can cause skin complications, such as erythema, desquamation, and telangiectasia inside or outside the photon field. The amount of electron contamination depends on factors, such as radiation field size, beam energy, and materials placed in the photon path. Electron contamination can be decreased by increasing the source distance to the point of measurement by the dosimeter, applying a lead foil, magnetic deflector, or replacing a portion of air column between patient and radiotherapy system head by helium gas, and also limiting the treatment field.

Sign in / Sign up

Export Citation Format

Share Document