Paul Rick L
Chemical Sciences Division, National Institute of Standards and Technology, Gaithersburg, MD, USA.
J Radioanal Nucl Chem. 2017 Feb;311(2):1149-1154. doi: 10.1007/s10967-016-4935-x. Epub 2016 Jul 11.
A combination of cold neutron prompt gamma-ray activation analysis (CNPGAA) and thermal neutron (TN) PGAA was used to determine sulfur in fuel oils to develop a method to provide values for certification. CNPGAA was used to measure S/H mass ratios, and TNPGAA to measure hydrogen mass fractions. Measurements were combined to determine sulfur mass fractions (with expanded uncertainties) of 2.159 % ± 0.072 % for SRM 1622e, 0.7066 % ± 0.0120 % for SRM 1619b, and 0.1266 % ± 0.0030 % for SRM 1617b, in agreement with certified values. The results validate the method as suitable for certification of sulfur at mass fractions ≥ 0.1 %.
采用冷中子瞬发伽马射线活化分析（CNPGAA）和热中子（TN）PGAA相结合的方法测定燃料油中的硫，以开发一种提供认证值的方法。CNPGAA用于测量S/H质量比，TNPGAA用于测量氢质量分数。将测量结果相结合，得出SRM 1622e的硫质量分数（扩展不确定度）为2.159%±0.072%，SRM 1619b为0.7066%±0.0120%，SRM 1617b为0.1266%±0.0030%，与认证值一致。结果验证了该方法适用于质量分数≥0.1%的硫的认证。
