GB/T 41330 - 2022 provides for the determination of trace copper, iron, sodium, calcium and mg by inductively coupled plasma mass spectrometry (ICP-MS) for boiler water and chilled down water. The content of these elements affects the water quality and is related to the operation of boilers and chilled down systems. If it is too high, it is easy to cause scaling and corrosion. The standard provides accurate detection methods to help enterprises monitor water quality, and ensure the stable operation of the system by controlling the content of elements. It is of great significance in industrial water cycle management and equipment maintenance.