Multielement Analysis of Oil by ICP–AES and ICP–MS with Microwave-Assisted Sample Preparation

Abstract

To obtain detailed information on the elemental composition of oil, we developed ICP–AES and ICP–MS procedures for the determination of a wide range of elements in oil after microwave sample digestion. We found a possibility and selected the conditions of the microwave decomposition of samples of light and superviscous oils, weighing up to 1000 mg. The effect of residual acidity and residual carbon on the formation of an analytical signal in ICP–AES and ICP–MS (high resolution) was studied. We found that 20 elements can be determined by ICP–AES at a level of n × 10–2–m × 102 μg/g and 42 elements can be determined by ICP–MS at a level of n × 10–2–m × 102 ng/g.