缩二脲
- 网络BIURET
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建立一种测定尿素中缩二脲含量的反相高效液相色谱(HPLC)方法。
A reversed - phase HPLC method was established to determine the biuret content in urea .
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缩二脲的平均回收率为100.4%,RSD为1.55%。
The average recoveries of biuret was 100.4 % , RSD was 1.55 % .
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影响阴离子聚丙烯酸羟基树脂包覆HDI缩二脲乳胶粒粒径的因素
Factors influencing HDI biuret particle size coated by anionic polyacrylic hydroxyl resin
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用结晶硫酸钠和HDI合成缩二脲的工艺探讨
Synthesis of Biuret Using HDI and Crystalline Sodium Sulfate
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使用相转化法,即将水溶性丙烯酸树脂和HDI缩二脲混合,然后加水稀释转相,制备了水性双组分丙烯酸聚氨酯。
A two-component waterborne polyurethane ( 2K-WPU ) was prepared by mixing water soluble acrylic resin and HDI biuret , and then diluting it to phase inversion with water .
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402-C改造引起成品中缩二脲含量变化的原因分析
Reasons for the increase of biuret in product after the revamp of 402-c
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将水性丙烯酸树脂和HDI缩二脲混合后,加水稀释,制备了水性双组份聚氨酯(2K-WPU)。
A kind of two-component waterborne polyurethane ( 2K-WPU ) was prepared by mixing HDI biuret and water-soluble acrylic resin , a dilution with water being followed .
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本文用结晶硫酸钠和HDI合成了具有缩二脲结构的多异氰酸酯,改进了连续萃取装置进行后处理,分离出未反应的HDI单体。
Polyisocyanate with biuret structure was produced by the reaction of crystalline sodium sulfate with hexamethylene diisocyanate ( HDI ) . Continuous extraction apparatus was improved to separate the free HDI monomer in the mixture .
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通过对样品进行加热浓缩和赶氨处理,改进了测定含氨样品中缩二脲的方法,其分析周期由原来的6h降至1h以内。
By concentrating the sample with heating and driving off ammonia , the method is improved for the determination of biuret in the ammonia containing sample , and the analysis cycle is shortened from the original 6 h to less 1 h.
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以HDI缩二脲为固化剂,丙烯酸树脂为多元醇组分,得到稳定分散的双组分水性聚氨酯乳液,研究了溶剂、单体组成、相对分子质量、丙烯酸等因素。
A stable 2K waterborne polyurethane emulsion , based on HDI Biurea as hardener and acrylic polyol as binder , has been developed , through study on solvents , composition of monomers , molecular weight and acrylic acid .
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降低聚丙烯酸链间的氢键作用力,增加羟基和HDI缩二脲间的氢键作用力,能获得粒径小而均匀的包覆粒子。
It was concluded that a small composite particle with narrow distribution could be obtained , by decreasing the hydrogen bond force among acrylic hydroxyl chains and increasing the hydrogen bond force between acrylic hydroxyl chain and HDI biuret .
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本文采用基团贡献方法估算了双组份涂料中丙烯酸聚合物及固化剂HDI缩二脲的三维溶解度参数,并以此为基础选择了体系合适的溶剂;
In order to obtain high performance two-component acrylic polyurethane coating , a method based on molar group contribution has been proposed for estimating three solubility parameters of acrylic polymers and HDI biuret . According to the theory of solubility parameter , the suitable solvent blends are selected .
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缩二脲添加浓度66.7g/kg无干扰。
A Biuret concentration 66.7 g / kg is without interference .
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缩二脲法分光光度测定豆类和谷类蛋白质
Spectrophotometric Determination of Beans and Cereals Proteins by the Biuret Method
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镧系元素硝酸盐与缩二脲固体配合物的合成及性质
Syntheses and properties of solid complexes between lanthanide nitrates and biuret
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复混肥中缩二脲含量对作物生长的影响
Effect on the crops growth of biuret concentrations in the compound fertilizer
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缩二脲的工农业应用及合成
Application of Biuret in Industry & Agriculture and Its Synthesis
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水性丙烯酸树脂/HDI缩二脲复混物的制备及表征
Preparation and Characterization of Mixture of Waterborne Acrylic Resin and HDI Biuret
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成品尿素缩二脲波动的原因分析及其处理
Reasons for the biuret undulating in end urea product and settle measures
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分光光度法测定复混肥料中缩二脲含量的研究
Studies on the Determination of Biuret Content in Compound Fertilizer by Spectrophotometry
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缩二脲法测定谷物蛋白质
Spectrophotometric Determination of Cereals Proteins by the Biuret Method
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微波辐射固相法合成缩二脲铜配合物
Syntheses of the Copper Complexes of Biuret by Solid Phase Reaction with Microwave Irradiation
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硝酸铀酰与缩二脲的固体配合物的合成及性质
Solid coordination compound of uranyl nitrate with biuret
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浅谈尿基复混肥生产中缩二脲的控制措施
Superficially on measures for biuret control in the production of urea base compound fertilizer
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自制的缩二脲产品与羟基丙烯酸树脂所配成的漆具有优良的性能。
The paint compounded with the product and hydroxyl acrylic resins was of good performance .
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尿素锌中缩二脲质量分数的测定
Determination of Biuret in Zinc - Urea
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缩二脲与尿素共存时,其毒害临界浓度大大降低,二者呈双重毒害作用。
The critical toxic concentration of biuret was markedly lowered in the presence of urea .
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尿素生产过程缩二脲控制
Control of biuret in urea production
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肥料中过高的缩二脲含量使小麦、玉米等肥害事件屡次发生,经济损失严重。
The excess content of biuret in urea fertilizer causes damage to the wheat and corn .
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一种快速测定缩二脲的方法
A Quicker Method of Determining Biuret