Liquid petroleum products - Determination of sodium content - Atomic absorption spectrometric method

This technical specification outlines the analytical procedure for determining sodium concentration within petroleum products. It employs atomic absorption spectrophotometry as the primary method to ensure accurate quantification of this metallic impurity. The document details the necessary instrumentation, reagents, and calibration protocols required for executing the analysis. It specifies the preparation of samples and the operation of the spectrophotometer under controlled conditions to minimize experimental error. By establishing a uniform methodology, this document facilitates the comparison of test results across different laboratories and industries. It covers the range of applicability for various types of liquid hydrocarbon fuels and lubricants. The text describes the calculation methods used to derive the final concentration values from the instrument readings. Furthermore, it addresses potential interferences and the steps taken to mitigate them during the measurement process. This approach ensures consistency in quality control procedures related to fuel purity and lubricant performance. The guidance provided supports the maintenance of product specifications and compliance with regulatory requirements regarding impurity limits. It serves as a reference for analysts working in chemical laboratories associated with the energy sector.