二硝酸盐

Use nitrite and the Sulfanilic acid diazotization in acidic conditions,with dinitroaniline coupling formation color reaction,established the method of using the color reaction Determination Chinese cabbage s Nitrite content.

在酸性条件下亚硝酸盐与对氨基苯磺酸重氮化后，再与盐酸萘乙二胺偶合形成颜色反应，建立了用比色法测定大白菜中亚硝酸盐的方法。

They can be chosen as a organic urea enzyme inhibitor.3 The adsorptive effect of some additive that the power of zeolite is ,which can adsorb big molecules and ions, is regard as a good additive.4 The adsorptive effect of some bond indicated that HA of turfy soil and CMC were both good bonds.

缓释氮肥PCF、磷钾肥和硝化抑制剂双氰胺进行三因素五水平的二次通用旋转组合模型设计：对于油菜硝酸盐在生育期内的动态变化规律来说，PCF、磷钾肥和双氰胺过高、过低都不利于油菜的正常生长，中量水平处理时较好。

The decomposition of EAK( Ethylenediamine Dinitrate Ammonium Nitrate Potassium Nitrate) eutectic intermolecular explosive was investigated by means of DSC.

通过DS C分析研究了EA K（乙二胺二硝酸盐硝酸铵硝酸钾）低共熔物分子间炸药的热分解特性，测定了EAK 的分解动力学参数。

Nitrate contents of main vegetables and fruits in Yaan city's markets were determined by disulfonic acid colorimetry method. Nitrate pollution levels were evaluated by evaluation criteria of nitrate content classification in China.

方法］采用酚二磺酸比色法对雅安市城区市售主要蔬菜和水果硝酸盐含量进行了测定，并参照我国硝酸盐含量分级评价标准对其硝酸盐污染状况进行了评价。

The comparison analysis of nitrate nitrogen determination is conducted with the same standard solution and natural water samples by two methods of spectrophotometric method with phenol disulfonic acid and ultraviolet spectrophotometer.

采用同一标准液和天然水样用酚二磺酸光度法和紫外分光光度法测定硝酸盐氮，进行比对分析，同时调查云南省内用此两种方法密码样考核的情况。

spectrophotometric method with phenol disulfonic acid ; ultraviolet spectrophotometer ; nitrate nitrogen ; comparison

本文通过对常用的酚二磺酸光度法和紫外分光光度法进行实验比对，同时调查云南省内两种分析方法考核的情况，从而找出两种方法的优缺点，供分析人员在实践中借鉴。l原理1.1酚二磺酸光度法测定的原理方法依据：GB7480一87《水质硝酸盐氮的测定酚二磺酸分光光度法》。用浓硫酸与苯酚作用生成酚二磺酸

Methods According to Chinese standard analysis method of foods (GB/T 5009133-2003), 108 samples of cured meat products were determined nitrite content by naphthyl ethylenediamine hydrochloride colorimetry. The results were analyzed.

采用国家食品卫生检验标准方法(GB/T 5009133-2003)即食品中亚硝酸盐与硝酸盐的盐酸蔡乙二胺比色法对市场上抽检108份腌腊制品中亚硝酸盐含量进行测定，对测定结果进行分析。

The main synthetic methods and application prospect of organic energetic dinitrate salt s,ethylenediamine dinitrate,azobisformamidine dinitrate,carbohydrazinium dinitrate,polyaminoguanidine dinitrate and tetrazine dinitrate,were reviewd with 26 references.

综述了乙二胺二硝酸盐、偶氮二甲醚二硝酸盐、碳酰肼二硝酸盐、氨基胍类二硝酸盐和四嗪类二硝酸盐等有机含能二硝酸盐的主要合成方法及应用前景。

The watermelon sample was extracted with ultrasound,protein was precipitated with potassium ferrocyanide and zinc acetate,and the pigment was decolored with activated carbon,nitrate would produce yellow compound with phenonldisulponic acid on condition of base.

在超声器中提取西瓜样品，用亚铁氢化钾和乙酸锌沉淀蛋白，活性碳脱色素，酚二磺酸碱性条件下和硝酸盐生成黄色化合物，样品的硝酸盐检测结果有较好的准确度和精密度，能满足样品分析需要。

Place 5 ml in a test-tube immersed in iced water, add 0.4 ml of a 100 g/l solution of potassium chloride R, 0.1 ml of diphenylamine solution R and, dropwise with shaking, 5 ml of nitrogen-free sulphuric acid R.

硝酸盐：取本品5ml置试管中，于冰浴中冷却，加100g/l氯化钾溶液0.4ml与0.1%二苯胺溶液0.1ml，边摇边滴加无氮的硫酸5ml，摇匀，将试管于50℃水浴中放置15分钟，溶液产生的蓝色与标准硝酸盐溶液(2 ppm NO3)0.5ml，加无硝酸盐的水4.5ml，在同一时间用同一方法处理后的颜色比较，不得更深。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失