HG/T 3518-2011
ActiveIndustrial circulating cooling water--Determination of mercaptobenzo-thiazole
工业循环冷却水中巯基苯骈噻唑测定方法
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 Foreword → 1 Scope → 2 Normative References → 3 Method Summary → 4 Reagents and Materials → 5 Instruments and Equipment → 6 Analysis Procedure → 7 Calculation of Results → 8 Tolerance
Scope
This standard specifies the method for the determination of mercaptobenzothiazole in industrial circulating cooling water by ultraviolet spectrophotometry. This standard is applicable to the determination of mercaptobenzothiazole in phosphorus-based circulating cooling water and phosphorus-based composite inhibitors. The determination range is 0.2 mg/L to 1 mg/L.
本标准规定了采用紫外分光光度法测定工业循环冷却水中巯基苯骈噻唑的方法。本标准适用于磷系循环冷却水和磷系复合抑制剂中巯基苯骈噻唑的测定。测定范围为0.2 mg/L～1 mg/L。
Normative References
Keywords
Application Summary AI generated
Water treatment technicians in the chemical industry use this standard to determine the content of mercaptobenzothiazole in industrial circulating cooling water. The standard provides an accurate and reliable detection method using ultraviolet spectrophotometry, which helps monitor water quality and optimize water treatment processes. It is important for ensuring the stable operation of circulating cooling water systems and preventing corrosion and scaling issues.
化工行业的水处理技术人员使用该标准来测定工业循环冷却水中的巯基苯骈噻唑含量。该标准通过紫外分光光度法提供了一种准确、可靠的检测手段，有助于监控水质和优化水处理工艺。它对于确保循环冷却水系统的稳定运行和防止腐蚀、结垢等问题具有重要意义。
AI Summary AI generated
This standard specifies the ultraviolet spectrophotometric method for determining mercaptobenzothiazole in industrial circulating cooling water, applicable to phosphorus-based circulating cooling water and phosphorus-based composite inhibitors, with a determination range of 0.2-1 mg/L. The method involves acidification, chloroform extraction, and absorbance measurement at 329 nm. The standard details reagents, instruments, analysis procedures, calculation of results, and tolerance, emphasizing safety precautions when using strong acid and chloroform.
本标准规定了工业循环冷却水中巯基苯骈噻唑的紫外分光光度测定方法，适用于磷系循环冷却水和磷系复合抑制剂，测定范围为0.2-1 mg/L。方法基于酸化后用氯仿萃取，在329 nm处测定吸光度。标准详细描述了试剂、仪器、分析步骤、结果计算和允许差，并强调使用强酸和氯仿时的安全防护。
Key Sentences extracted from text
本标准规定了采用紫外分光光度法测定工业循环冷却水中巯基苯骈噻唑的方法。
将循环冷却水水样酸化，用氯仿萃取巯基苯骈噻唑，以紫外分光光度法测定。
移取1.00 mL、2.00 mL、3.00 mL、4.00 mL、5.00 mL巯基苯骈噻唑标准溶液，分别加入150 mL分液漏斗中，用水稀释至约50 mL，加3滴盐酸溶液，混匀。
移取50.00 mL经慢速滤纸过滤后的水样于150 mL分液漏斗中，加3滴盐酸溶液，混匀。
取平行测定结果的算术平均值为测定结果。平行测定结果的绝对差值当巯基苯骈噻唑含量为1 mg/L时两个结果的差值不大于0.03 mg/L。
This standard specifies the method for the determination of mercaptobenzothiazole in industrial circulating cooling water by ultraviolet spectrophotometry.
Acidify the circulating cooling water sample, extract mercaptobenzothiazole with chloroform, and determine by ultraviolet spectrophotometry.
Transfer 1.00 mL, 2.00 mL, 3.00 mL, 4.00 mL, 5.00 mL of mercaptobenzothiazole standard solution into 150 mL separatory funnels respectively, dilute to about 50 mL with water, add 3 drops of hydrochloric acid solution, and mix.
Transfer 50.00 mL of water sample filtered through slow filter paper into a 150 mL separatory funnel, add 3 drops of hydrochloric acid solution, and mix.
Take the arithmetic mean of the parallel determination results as the determination result. The absolute difference between two results when the mercaptobenzothiazole content is 1 mg/L shall not exceed 0.03 mg/L.
Standard Timeline
Changes from replaced version:
- 本次为第三次修订，代替HG/T 3518—2003
- 标准编号由HG/T 3518—2003更新为HG/T 3518—2011
- This is the third revision, replacing HG/T 3518—2003
- Standard number updated from HG/T 3518—2003 to HG/T 3518—2011