GB/T 6730.46-2025 in English

This standard specifies a method for determining the arsenic content in iron ore using distillation separation and the arsenic molybdenum blue spectrophotometry. It outlines the principles, reagents, apparatus, sample preparation, and analytical procedures required to accurately measure arsenic levels. The method involves the distillation of arsenic compounds from the sample, followed by the formation of a colored complex with molybdenum blue, which is then analyzed using spectrophotometric techniques. This approach ensures precise and reliable results, suitable for use in various analytical laboratories. The standard provides detailed instructions for calibration, quality control, and the interpretation of results, ensuring consistency and accuracy in the determination process. It is applicable to a range of iron ore samples and is intended to support routine analytical testing and compliance with regulatory requirements.