Comparative performance of INAA and other spectroscopy techniques in the elemental analysis of stainless steel materials

Comparative performance of semi-absolute k 0-instrumental neutron activation analysis and Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) for compositional decoding of aluminum base alloys

Samples of certified aluminum base alloys were analyzed by semi-absolute, standardless k 0-instrumental neutron activation analysis (k 0-INAA) for compositional decoding. Irradiations were performed at two research reactors located at Pakistan Institute of Nuclear Science and Technology having nominal thermal neutron fluxes of 1013 and 1012 cm−2 s−1. The experimentally optimized parameters for NAA suggest a maximum of three sets of irradiations for the quantification of 8 major and minor elements. Moreover, the same conditions provided quantitative results for 10 other elements as impurities, which were not reported by the supplier of the reference material. The same alloys were analyzed by inductively coupled plasma optical emission spectrometry (ICP-OES) where all impurity elements, quantified by k 0-INAA, were below the detection limits. A comparison of % relative deviation of the results obtained by k 0-INAA and ICP-OES revealed that the former has better accuracy than ICP-OES, but k 0-INAA has poor limits of detection for Mg, Si and Ti in aluminum base alloy.

Application of the INAA technique for elemental analysis of metallic biomaterials used in dentistry

The sensitive nuclear analytical technique Instrumental Neutron Activation Analysis (INAA) has been applied on several types of metallic biomaterials (Heraenium CE, Ventura Nibon, Wiron 99 and Ducinox which are currently used for restoration in the dental clinics) to study its performance in elemental analysis and identify eventual limitations. The investigation has been performed by two NAA Laboratories and aimed at getting an answer to the question on how the biomaterials compositions influence the patients' health over the course of time, taking into account the EC Directive 94/27/EC recommendations concerning Ni toxicity.