The organophosphate scale inhibitor (HEDP)-containing C–P bond is an agent widely used in the circulating cooling system to ensure the safe operation. In order to explore the effects of its decomposition and migration transformation in the system on the system security, it is necessary to carry out the quantitative and qualitative analysis of organic phosphorus in fouling. According to the Ivanoff method, with the organic phosphorus extraction rate as an indicator, the types and concentrations of extractants, extraction time, and mass of the extracted scale were optimized. When the mass of the extracted scale was 0.4 g, the extraction rates of active organic phosphorus and moderately active organic phosphorus were, respectively, 46.53 and 47.14%, and there was no inactive organic phosphorus and residual phosphorus. The total extraction rate of organic phosphorus was up to 94.32%. The optimum extraction conditions of various organic phosphorus components were determined as follows: 10 h extraction in 0.5 mol/L KHCO3 for active organic phosphorus and 3 h extractionin 1.0 mol/L HCl solution for moderately active organic phosphorus.The optimized extraction process only involves two steps: acid extractionof active organic phosphorus and acid extraction of moderately activeorganic phosphorus. The optimized method is characterized by the simpleoperation and good extraction effect and can be applied in the detectionand analysis of organic phosphorus in the fouling of the circulatingcooling system.
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机译：含有有机磷酸酯阻垢剂（HEDP）的C-P键是一种广泛用于循环冷却系统中的试剂，可确保安全运行。为了探索其分解和迁移转化在系统中对系统安全性的影响，有必要对结垢中的有机磷进行定量和定性分析。按照Ivanoff法，以有机磷的提取率为指标，对提取剂的种类和浓度，提取时间，提取水垢的质量进行了优化。当提取鳞的质量为0.4g时，活性有机磷和中度活性有机磷的提取率分别为46.53和47.14％，并且没有惰性有机磷和残留磷。有机磷的总提取率高达94.32％。确定各种有机磷组分的最佳提取条件如下：在0.5 mol / L KHCO3中提取10 h用于活性有机磷，再提取3 h溶于1.0 mol / L HCl溶液中的中等活性有机磷。优化的提取过程仅涉及两个步骤：酸提取活性有机磷的提取及中等活性酸的提取有机磷。优化方法的特点是简单操作简便，提取效果好，可用于检测循环污垢中有机磷的分析与分析冷却系统。
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