缩二脲

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 .

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 % .

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

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

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 .

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

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 .

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 .

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.

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 .

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 .

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 .

缩二脲添加浓度66.7g/kg无干扰。

A Biuret concentration 66.7 g / kg is without interference .

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

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

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

缩二脲的工农业应用及合成

Application of Biuret in Industry & Agriculture and Its Synthesis

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

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

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

缩二脲法测定谷物蛋白质

Spectrophotometric Determination of Cereals Proteins by the Biuret Method

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

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

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

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 .

尿素锌中缩二脲质量分数的测定

Determination of Biuret in Zinc - Urea

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 .

尿素生产过程缩二脲控制

Control of biuret in urea production

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 .

一种快速测定缩二脲的方法

A Quicker Method of Determining Biuret