Identification of potential environmental sources of childhood lead poisoning by inductively coupled plasma mass spectrometry. Verification and case studies

Stable Lead Isotope Record of Lead Pollution in Loch Lomond Sediments since 1630 A.D.

“…Aliquots of the 116 dried sections from the core were digested for several hours in hot mixed acid (0.3-0.5 g of sediment, 20 cm 3 of 8 M HNO 3 , 10 cm 3 of 11.6 M HCl, filtration, further 5-10 cm 3 aliquots of 11.6 M HCl until brown fumes of NO 2 driven off) prior to preparation (in 1 M HCl) for determination of lead by flame atomic absorption spectrometry (Unicam SP-9 800) and in hot nitric acid (0.1 g of sediment, 30 cm 3 of 8 M HNO 3 ) prior to preparation (in 2% v/v HNO 3 ) for analysis by inductively coupled plasma-mass spectrometry (VG Plasmaquad PQ1 or Plasmaquad PQ2) for 206 Pb/ 207 Pb (14). The mean 206 Pb/ 207 Pb ratio for the reference material IAEA SL-1, lake sediment, was 1.214 ( 0.006 (n ) 34), in agreement with the 1.214 ( 0.012 value of Viczian et al (19). The mean 206 Pb/ 207 Pb ratio for the reference material IAEA SL-1, lake sediment, was 1.214 ( 0.006 (n ) 34), in agreement with the 1.214 ( 0.012 value of Viczian et al (19).…”

Semiquantitative Analysis of Biological Materials by Inductively Coupled Plasma–Mass Spectrometry

“…The spectrometer settings were optimized with a 10 mg L 01 solution containing 7 Li, 63 Cu, 114 Cd, and Bi for the instrument external calibration. The internal reference was simultaneously introduced with the blank, external standard, and sample solution streams by an on-line, merging-stream flow arrangement described previously (19). All samples were transported to the ICP-MS with a variable speed peristaltic pump (Rabbit, Rainin Instruments, Wolburn, MA).…”

Estudo comparativo de métodos de preparo de amostras de tinta para a determinação de metais e metalóides por técnicas de espectrometria atômica

“…São encontrados poucos trabalhos envolvendo a determinação de elementos em tintas [11][12][13][14][15][16][17][18][19] e a maioria diz respeito à determinação de Pb. [9][10][11][12][13][14] Em quase todos os trabalhos o estudo envolveu um único tipo de tinta.…”

“…[9][10][11][12][13][14] Em quase todos os trabalhos o estudo envolveu um único tipo de tinta. Os métodos de preparação da amostra geralmente envolveram decomposição parcial da tinta e posterior calcinação, ou decomposição da tinta com mistura de ácidos em forno de microondas.…”