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GB/T 45131-2025_Chinese: Analysis of water used in boiler and cooling system - Determination of phosphate, chloride, silicate, total alkalinity, phenolphthalein alkalinity, hardness and iron - Spectrophotometric detection by discrete analysis systems (Chinese: 锅炉用水和冷却水分析方法 磷酸盐、氯化物、硅酸盐、总碱度、酚酞碱度、硬度和铁的测定 基于间断分析系统的分光光度法) Note/Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working-hours typically, ASAP English versions: GB/T 45131-2025
