Determination of trace elements in raw material for polyurethane production using direct sampling graphite furnace atomic absorption spectrometry

Atomic spectrometry update. Review of advances in the analysis of metals, chemicals and functional materials

“…The authors explained their analytical strategy and gave a convenient schematic. Relative uncertainties of the Cf isotopic ratios ranged from 0.3-0.5%, whereas the uncertainty values for 249 Bk/ 248 Cm and 249 Cf/ 248 Cm were 6.1% and 3.2%, respectively. The level of uncertainty was in agreement for the requirement for transmutation studies.…”

“…The introduction of oxygen to the collision cell enabled the authors to determine 236 U 16 O/ 238 U 16 O in the range 10 À9 to 10 À7 without the need to correct for spectral interferences. Another paper described a novel method for determining 249 Bk/ 248 Cm and 249 Cf/ 248 Cm in a sample of curium enriched with 248 Cm to a concentration of 97%. 149 The sample was rst irradiated in a thermal neutron ux, dissolved in nitric acid and then the Bk and Cf separated using a strong cation exchange column.…”

“…Another application that used solid sampling GFAAS was presented by Rodrigues et al 248 who determined Fe, Mg, Mn and Na in polymeric diphenylmethane dianiline, a raw material for polyurethane production. Sample of mass between 0.5 and 35 mg was used and calibration was against aqueous standards.…”

Microwave-Assisted Solid Sampling Analysis Coupled to Flame Furnace Atomic Absorption Spectrometry for Cd and Pb Determination in Food-Contact Polymers

“…Table 1 shows the linear calibration ranges, linear equations, and the coefficients of determination (R 2 ) obtained for each analyte. To avoid under-or overestimated results, the effect of the sample mass-introduced into the MW-SS system was also evaluated [30,31]. This evaluation was performed by weighing the masses of ERM, EC 680k, from 0.5 to 10 mg for Cd, and from 5.5 to 33 mg for Pb.…”

“…The obtained RSDs considering all the evaluated masses were lower than 15%, which is appropriate for solid sampling analysis [13]. To avoid under-or overestimated results, the effect of the sample mass-introduced into the MW-SS system was also evaluated [30,31]. This evaluation was performed by weighing the masses of ERM, EC 680k, from 0.5 to 10 mg for Cd, and from 5.5 to 33 mg for Pb.…”