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Determination of Chlorine Contents in Geological Survey of Japan Reference Materials by Prompt Gamma Neutron Activation Analysis
Author(s) -
Sano Takashi,
Fukuoka Takaaki,
Hasenaka Toshiaki
Publication year - 2004
Publication title -
geostandards and geoanalytical research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.037
H-Index - 73
eISSN - 1751-908X
pISSN - 1639-4488
DOI - 10.1111/j.1751-908x.2004.tb00762.x
Subject(s) - chlorine , neutron activation analysis , neutron activation , calibration , radiochemistry , sodium , chemistry , isotopes of chlorine , neutron , analytical chemistry (journal) , mineralogy , nuclear chemistry , environmental chemistry , nuclear physics , physics , organic chemistry , quantum mechanics
We determined chlorine contents in nine GSJ (Geological Survey of Japan) reference materials (JB‐1, 1a, 2, 3; JA‐1, 2, 3; JR‐1, 2) by prompt gamma neutron activation analysis, employing the standard addition method. Pressed powder disks of each reference material were used for neutron irradiation and gammaray measurement, after known quantities (25‐200 μl) of sodium chloride solution were added. The influence of the nearby sodium peak overlap was checked, and fluctuations in the chlorine count rate were corrected using silicon as an internal standard. The slopes of calibration lines for seven reference materials (JB‐1, 2, 3; JA‐1, 2, 3; JR‐2) and SiO 2 powders fall within 5% error, and their chlorine values were obtained from the intercepts. Chlorine contents in JB‐1 a and JR‐1 were also determined by using the calibration lines. Our chlorine values ranged from 26.1 to 934 μg g‐ 1 , which agrees well with the previously reported values.