HG/T 3540-2011
AbolishedIndustrial circulating cooling water--Determination of total phosphate
工业循环冷却水中总磷酸盐含量的测定
Catalogue
前言 → 1 范围 → 2 规范性引用文件 → 3 方法提要 → 4 试剂和材料 → 5 仪器、设备 → 6 分析步骤 → 7 结果计算 → 8 允许差 → 附录A → 附录B → 附录C Foreword → 1 Scope → 2 Normative References → 3 Principle of Method → 4 Reagents and Materials → 5 Instruments and Equipment → 6 Analysis Procedure → 7 Calculation of Results → 8 Permissible Deviation → Annex A → Annex B → Annex C
Scope
This standard specifies the method for the determination of total phosphate content in industrial circulating cooling water by phosphomolybdenum blue spectrophotometry. This standard is applicable to the determination of total phosphate content in industrial circulating cooling water in the range of 0.02 mg/L to 50 mg/L (as PO4).
本标准规定了采用磷钼蓝光度法测定工业循环冷却水中总磷酸盐含量的方法。本标准适用于工业循环冷却水中总磷酸盐含量在0.02 mg/L～50 mg/L(以PO4计)的测定。
Normative References
Keywords
Application Summary AI generated
Operators and quality control personnel in industrial circulating cooling water systems use this standard to measure total phosphate levels in water. Accurate phosphate determination helps monitor the effectiveness of water treatment chemicals, preventing scaling and corrosion, and ensuring safe and efficient system operation. This standard is crucial for maintaining cooling water quality and extending equipment lifespan.
工业循环冷却水系统的操作人员和质检人员使用该标准来检测水中总磷酸盐含量。通过准确测定磷酸盐浓度，可以监控水处理药剂的效果，防止结垢和腐蚀，确保系统安全高效运行。该标准对于保障工业冷却水水质、延长设备寿命具有重要意义。
AI Summary AI generated
This standard specifies a phosphomolybdenum blue spectrophotometric method for determining total phosphate in industrial circulating cooling water. The method uses potassium persulfate digestion to convert polyphosphates and organic phosphorus to orthophosphate, which then reacts with ammonium molybdate and ascorbic acid to form phosphomolybdenum blue, measured at 710 nm. It is applicable for phosphate concentrations from 0.02 to 50 mg/L (as PO4). The standard details reagent preparation, calibration curve, sample handling, calculation, and provides interference limits and permissible deviations.
本标准规定了工业循环冷却水中总磷酸盐含量的磷钼蓝分光光度测定法。方法基于过硫酸钾消解将聚磷酸盐和有机膦转化为正磷酸盐，再与钼酸铵和抗坏血酸反应生成磷钼蓝，在710 nm处测定吸光度。适用于0.02-50 mg/L（以PO4计）的测定。标准详细列出了试剂配制、校准曲线绘制、样品处理和计算步骤，并给出了干扰物质和允许差要求。
Key Sentences extracted from text
本标准规定了采用磷钼蓝光度法测定工业循环冷却水中总磷酸盐含量的方法。
在酸性溶液中，用过硫酸钾作分解剂，将聚磷酸盐和有机膦转化为正磷酸盐，正磷酸盐与钼酸铵反应生成黄色的磷钼杂多酸，再用抗坏血酸还原成磷钼蓝，于710 nm最大吸收波长处用分光光度法测定，得出总磷酸盐含量。
分别取0.00 mL(空白)、1.00 mL、2.00 mL、3.00 mL、4.00 mL、5.00 mL、6.00 mL、7.00 mL、8.00 mL磷标准溶液于9个50 mL容量瓶中，用水稀释至约25 mL。
在分光光度计710 nm处，用1 cm吸收池，以试剂空白为参比测其吸光度。
取平行测定结果的算术平均值为测定结果，平行测定结果的允许差应符合表1的规定。
This standard specifies the method for the determination of total phosphate content in industrial circulating cooling water by phosphomolybdenum blue spectrophotometry.
In acidic solution, using potassium persulfate as a decomposition agent, polyphosphates and organic phosphorus are converted to orthophosphate, which reacts with ammonium molybdate to form yellow phosphomolybdic heteropoly acid, then reduced by ascorbic acid to phosphomolybdenum blue, and determined by spectrophotometry at the maximum absorption wavelength of 710 nm to obtain the total phosphate content.
Transfer 0.00 mL (blank), 1.00 mL, 2.00 mL, 3.00 mL, 4.00 mL, 5.00 mL, 6.00 mL, 7.00 mL, 8.00 mL of phosphorus standard solution into nine 50 mL volumetric flasks, dilute with water to about 25 mL.
Measure the absorbance at 710 nm using a 1 cm absorption cell with the reagent blank as reference.
Take the arithmetic mean of parallel determination results as the determination result, and the permissible deviation of parallel determination results shall comply with the provisions of Table 1.
Standard Timeline
Changes from replaced version:
- 标准名称改为《工业循环冷却水中总磷酸盐含量的测定》
- 删除了正磷酸盐含量的测定(见1990年版的第2章)
- 删除了总无机磷酸盐含量的测定(见1990年版的第3章)
- Standard name changed to 'Determination of total phosphate content in industrial circulating cooling water'
- Deleted the determination of orthophosphate content (see Chapter 2 of the 1990 edition)
- Deleted the determination of total inorganic phosphate content (see Chapter 3 of the 1990 edition)