Method development and validation for sulfur determination via CS molecule in petroleum green coke by high resolution continuum source molecular absorption spectrometry

Microwave-induced combustion for petroleum coke digestion: a promising sample preparation strategy for subsequent elemental determination

“…10 The protocol recommended by ASTM 5600 is laborious, taking a long time for digestion and involving several steps. Literature concerning the sample preparation methods for petroleum coke is also scarce due to the high stability of the sample matrix and almost all studies already published are devoted to maximum 3 analytes determination, as Cl 11 and S [12][13][14][15] or Ni 16 and V, 15,17 Fe, 18 or other elements. 19 There is only one study that permits the determination of about thirteen elements and involves the X-ray uorescence analysis.…”

Desenvolvimento De Método Para Determinação De Enxofre Em Cabelo Por Espectrometria De Absorção Molecular De Alta Resolução Com Fonte Contínua E Forno De Grafite

“…(Baumbach et al, 2013;Ferreira et al, 2010; Ozbek & Baysal, 2017 a ) , são mais estáveis termicamente do que as espécies orgânicas, como tioureia e Lcisteína. (Ferreira et al, 2010;Heitmann et al, 2006;Ozbek & Baysal, 2017 a ;Pereira et al, 2018) Por exemplo, o método proposto por Camera et al (2017) Vazão do gás auxiliar (L min -1 ) 0,60 Taxa de nebulização (L min -1 ) 0,55…”