The effect of high amounts of chlorine and sodium on measurement of aluminum by instrumental neutron activation analysis and decrease of spectrum noises by means of digital low pass filter equations

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. This revised version was published online in July 2006 with corrections to the Cover Date.