Two New Polish Geological‐Environmental Reference Materials: Apatite Concentrate (CTA‐AC‐1) and Fine Fly Ash (CTA‐FFA‐1)

Abstract

World‐wide intercomparison runs has made possible the certification of two new Polish geological‐environmental reference materials for multi‐element trace analysis: Apatite Concentrate (CTA‐AC‐1) and Fine Fly Ash (CTA‐FFA‐1). “Recommended values’ are established for 25 (CTA‐AC‐1) and 40 (CTA‐FFA‐1) elements respectively. In addition, “information values’ are assigned for 12 elements in CTA‐AC‐1 and 10 elements in CTA‐FFA‐1. Our method of data evaluation has been further improved and a modified version of criteria for assigning recommended and information values is proposed.

Apatite Trace Element Compositions: A Robust New Tool for Mineral Exploration

“…Large fragments of both Durango and Madagascar apatite crystals were crushed and triplicate samples of each were obtained for analysis by randomly selecting 20 to 30 fragments (~40 mg). In the same run, a concentrate of apatite of the certified reference material CTA-AC-1 (Dybczynski et al, 1991) was also analyzed in triplicate to test the accuracy of the solution ICPMS results. Samples and blanks were treated the same way.…”

Raw Materials for Low-Activation Concrete Neutron Shields.

“…1and 2for different types of aggregates are plotted in Fig. 2(a); literature data [8][9][10][11][12][13] are also given. The two diagrams enclosed by broken lines are magnified images of the data for ordinary type of aggregates and for all the sandstones.…”

The role of NAA in securing the accuracy of analytical results in the inorganic trace analysis

“…In the recent M-3 HerTis intercomparison (cf. Table 1) the eleven results for Sc (in ng g −1 ) provided by the participating laboratories were as follows: 1 The results (7)-(11) were rejected as outliers in the process of evaluation of results used in our Laboratory [23,24]. Scandium was certified on the basis of results (1)-(6) as: 3.2 ± 0.4 ng g −1 (H. Polkowska-Motrenko et al private communication).…”

“…The danger associated with such hypothetical situation will be visualized on the example of the case of iron in Oriental Tobacco Leaves (INCT-OBTL-5) [12,13]. In total there were 63 laboratory averages (302 individual determinations) sent by the participating laboratories, only 3 averages were identified as outliers in the general population by the method being used by us during data evaluation [23,24]. The number of results by individual techniques were as follows: AAS (21), ES (21), ICP-MS (6) NAA (15).…”