Strategies to improve accuracy and sensitivity in phosphorus determinations by inductively coupled plasma quadrupole mass spectrometry

Abstract

A interface de colisão e reação com He introduzido pelo skimmer a 100 mL min-1 é empregada para melhorar a exatidão na determinação de 31 P + por ICP-QMS. A determinação de 31 P 16 O + em plasma frio resulta em limites de detecção 55 vezes menores. Essa é uma alternativa interessante para elementos com altos potenciais de ionização como o P. The collision/reaction interface with He introduced through the skimmer at 100 mL min-1 is employed to improve accuracy in 31 P + determinations by ICP-QMS. The 31 P 16 O + determination in cool plasma conditions result in limits of detection 55-fold lower. This strategy may be an interesting alternative for high ionization potential elements such as P.

Determination of P, S and Si in biodiesel, diesel and lubricating oil using ICP-MS/MS

“…14,15 Under the same conditions, an exothermic reaction will occur faster than an endothermic reaction, the enthalpies of reaction for P + and S + with O 2 are negative (À3.17 and À0.34 eV, respectively), and for Si with O 2 is slightly positive (0.11 eV). 16 Thus, this strategy has been used to determine oxides of these elements under cool plasma conditions, [17][18][19] and as reaction products using collision and reaction interfaces. [20][21][22] Yang and Jiang used a quadrupole-based dynamic and reaction cell (DRC) and O 2 gas ow in the DRC chamber to promote the Si, P and S oxide ion formation for further determination in steel samples.…”

The interference standard method: evidence of principle, potentialities and limitations

“…9 Collision-reaction cells and interfaces are instrumental alternatives that have been successfully used in routine and research applications to minimize spectral interference in ICP-MS determinations. [10][11][12] These are commercially available technologies that employ instrumental devices (cells or special cones) and additional gases (e.g. He, H 2 , O 2 and CH 4 ), which interact with analytes and interfering ions to minimize spectral interference by curbing the polyatomic ion formation and/or reducing the interfering ion kinetic energy.…”

“…He, H 2 , O 2 and CH 4 ), which interact with analytes and interfering ions to minimize spectral interference by curbing the polyatomic ion formation and/or reducing the interfering ion kinetic energy. [10][11][12] Another successful alternative that is related to signicant improvements of resolving power is the use of high-resolution ICP-MS instruments, such as double focusing mass analyzers, which allow the determination of several difficult elements even in complex matrices. 13 However, the relatively high cost of highresolution instruments prevents a wider use of this technology.…”

Tungsten coil electrothermal matrix decomposition and sample vaporization to determine P and Si in biodiesel by inductively coupled plasma mass spectrometry

“…This device is known as a collision-reaction interface (CRI) and more details on its principle of operation and applications can be found in the literature. [27][28][29] Helium and H 2 owing at 100 and 80 ml min À1 through the skimmer cone were used in P and Si determinations, respectively. Table 1 presents the ICP-MS operating conditions used in this work.…”