Determination of halogens by activation analysis with a californium-252 neutron multiplier

Abstract

An instrumental neutron activation analysis procedure is described for the determination of chlorine, bromine, and iodine using a 252Cf neutron multiplier (CFX) as the source of neutrons. The y-ray photopeaks from %I, "Br, 78mBr, and I2*I were measured to determine chlorine, bromine, and iodine; leN was used to determine fluorine by a method previously established using 252Cf without multiplication. Approximately 10-100 mg of sample are required for an analysis. The analytical precision and accuracy are generally better than 1% RSD. The method offers an attractive alternative to existing chemical and instrumental methods for the determination of the halogens because it has the potential for providing rapid, nondestructive analyses with reasonably good precision and accuracy for materials characterization.

Analytical methods for the determination of halogens in bioanalytical sciences: a review

“…In this case the detector assembly consists of an analyzing detector surrounded by shielding detectors [161]. The absolute LODs for fluorine, chlorine, bromine, and iodine using INAA in a reactor with a neutron flux of 10 13 neutrons per square centimeter per second is about 1,000, 10, 0.1, and 1 μg, respectively [162]. To improve the LODs for halogen determination by INAA, samples could be submitted to repeated cycles of irradiation, that is a pseudo-cyclic INAA method [161].…”

Organic elemental analysis

“…In the closed flask combustion method, Cu(N03)2 was used as absorbent for sulfur-containing material (88), while EDTA was added to the absorption solution for mercury compounds (89). Determination of chlorine, bromine, or iodine by neutron activation (90), and of iodine by isotopic exchange (91) were reported. Zarembo et al (92,93) determined fluorine by high resolution NMR which involves integration of the 18F signal by interfacing with a computer.…”