μFlow-injection–ICP collision cell MS determination of molybdenum, nickel and vanadium in petroleum samples using a modified total consumption micronebulizer

Abstract

An interface based on a total consumption micronebulizer was developed for the introduction of xylene solutions into ICP MS. The increase in the nebulizer capillary diameter and the elimination of the internal connections reduced the problem of clogging, pressure instability and memory effects. The xylene carrier could be introduced for several hours at a rate of 30 ml min À1 . The sample (2.5 ml) was injected into the carrier flow to produce peaks of 5 s at half-height (20 s at the base) which allowed a throughput of ca. 100 h À1 for the simultaneous determination of Mo, Ni and V. Calibration curves with good linearity (R 2 4 0.999) over at least three orders of magnitude and detection limits at the sub-ng ml À1 levels were obtained. The method was validated by the analysis of a sample by an independent (ICP AES) method and by the analysis of a NIST CRM 1085c lubricating oil material. The use of a helium-pressurized collision cell was essential to obtain good accuracy for Ni and V but was not required for Mo.

Development of a chromatographic methodology for the separation and quantification of V, Ni and S compounds in petroleum products

“…reported [27][28][29], and a summarized description is given below. A Thermo Scientific Element XR sector field ICP-HRMS instrument operated at a resolution of 4000 (medium resolution) was used to access spectrally interfered isotopes of laboratory-made, low-volume (8-mL), single-pass jacketed glass spray chamber without a drain, as described elsewhere [27].…”

Molecular Fingerprints and Speciation of Crude Oils and Heavy Fractions Revealed by Molecular and Elemental Mass Spectrometry: Keystone between Petroleomics, Metallopetroleomics, and Petrointeractomics

“…Mineralization or emulsification of samples through the use of new-generation nebulizers [52][53][54][55][56][57] , which limits destabilization of the plasma…”

“…61 In addition, several developments have been proposed for petroleum analysis in terms of the injection of samples by desolvation systems, such as ultrasonic nebulizers (USN), 52 direct injection nebulizers (DIN), 62 direct injection high efficiency nebulizers, 63 micro-nebulizers, or electrothermal vaporization (ETV) 55 to reduce the amount of organic solvent that enters the plasma. 56 The use of small quantities of petroleum samples by micro flow injection analysis (μFIA)-ICP-MS was developed by Giusti et al 57 by heating the nebulization chamber. This method decreases the matrix effects and thus enhances the ultimate limits of detection.…”

Different approaches of crude oil mineralisation for trace metal analysis by ICPMS

“…Many studies have been devoted to the optimisation of the operating conditions and to the development of nebulisers [1][2][3][4][5] and micro-nebulisers [6][7][8], the latter being especially recommended when using ICPMS. Several types of micro-nebulisers, spray chambers and automated systems are commercially available, designed especially for the analysis of organic samples.…”