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  • Author or Editor: H. Sharif x
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Abstract  

Aluminum levels of serum and red blood cell (RBC) were determined by instrumental neutron activation analysis (INAA) in 15 patients undergoing long-term haemodialysis. In the sample, aluminum was bombarded with thermal neutrons due to 27Al(n,γ)28Al and was determined by measuring 1779 keV gamma-ray of 28Al (T 1/2 = 2.24 min) with a HPGe detector. Phosphorus, causing an important interference by the fast neutron reaction, 31P(n,α)28Al, was determined by the photometric method to correct the net-area under the 28Al gamma-peak. The one-sample Kolmogorov-Smirnov test was used to control the normality distribution of the aluminum levels in serum and RBC. The results obtained were found to be in agreement with the serum aluminum determination performed by electrothermal atomic absorption spectrophotometry. The statistical results show a correlation between the aluminum levels of serum and RBC.

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Abstract  

Aluminum is a pathogenic factor in some diseases, like Alzheimer and aluminum toxicity in dialysis patients. This subject signifies Al measurement in biological samples. Different methods have been proposed for Al determination. One of the known methods for the analysis of this element is instrumental neutron activation analysis (INAA). 31P, 28Si, 32Cl and 24Na interfere the determination of Al in this method. In this study, the effects of high amounts of 38Cl and 24Na on the measurement of 28Al are discussed. The data gathered by the detector is filtered by an equation named digital low pass filter equation with the help of a computer. The net-areas of filtered and non-filtered peaks of 28Al are compared. Finally these areas are compared with the net-area of 28Al peak in the standard reference material, NIST-SRM-1547.

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