Determination of silver in biological reference materials by neutron activation analysis

作者：Mizera J^*; Randa Z; Kucera J

来源：Journal of Radioanalytical and Nuclear Chemistry, 2008, 278(3): 599-602.

DOI：10.1007/s10967-008-1101-0

Silver in selected, predominantly biological, reference materials (NIST SRM 1515, 1547, 1549, 1566a, 1571, 1577b, 2704, CTA-OTL-1, and Bowen's Kale) was determined using neutron activation analysis (NAA) in two different analytical modes: instrumental NAA with epithermal neutrons (ENAA), and NAA with radiochemical separation (RNAA). The ENAA mode was based on long-time 5-hour irradiation of samples in a special Cd lined box with counting after 8-month decay. The RNAA procedure consisted in 20-hour irradiation of samples, their decomposition/dissolution by alkaline-oxidative fusion, and precipitation of AgCl including several purification steps. Both methods provided Ag contents in the analyzed reference materials consistent with certified and/or literature values down to the ng center dot g(-1) level.

• 出版日期2008-12