NB/T 11390-2023 in English

The industry standard NB/T 11390-2023, titled "Quantitative Detection Method of Phthalate Esters in Transformer Oil by Gas Chromatography-Mass Spectrometry," was released on December 28, 2023, and is set to be implemented starting June 28, 2024. This standard provides a comprehensive methodology for the detection and quantification of phthalate esters in transformer oil using gas chromatography-mass spectrometry (GC-MS). Phthalate esters are a group of chemical compounds commonly used as plasticizers, and their presence in transformer oil can have significant implications for the performance and longevity of electrical transformers.

The standard outlines the necessary procedures for sample preparation, calibration, and analysis, ensuring accurate and reliable results. It specifies the use of GC-MS, a highly sensitive and selective analytical technique, to identify and quantify phthalate esters at trace levels. The method described in the standard is designed to be robust, reproducible, and suitable for routine laboratory use, making it an essential tool for quality control and regulatory compliance in the power industry.

By establishing a standardized approach to the detection of phthalate esters, NB/T 11390-2023 aims to enhance the safety, reliability, and efficiency of electrical transformers. The implementation of this standard will help utilities and manufacturers monitor and control the presence of these contaminants, thereby reducing the risk of transformer failure and extending the operational life of these critical components in the power grid.