查询词典 sodium chloride

Objective: We detected the content of methylene chloride and diethylene oxide in Ceftizoxime Sodium using head-space GC method.

目的：建立一种气相色谱法测定原料药头孢唑肟钠中二氯甲烷和四氢呋喃有机溶剂残留量的方法。

The limit of detection(S/N=3) of phosethyl Al, chloride, phosphate, sodium, phosphate were 15, 3, 12, 6, 5μgL^(-1) respectively.

三铝、Cl、HPO(上标 2-下标 3)、SO(上标 2-下标 4)、PO(上标 3-下标 4)的检出限(S/N=3)分别为15、3、12、6、5μgL^(-1)。

Nano-sized strontium titanate powder was prepared by direct precipitation method,with titanium tetrachloride,strontium chloride and sodium hydroxide as the raw materials.

钛酸锶(SrTiO3)是制备陶瓷电容器和热敏电阻器等电子陶瓷的重要原料，在电子工业上的应用非常广泛。

Nitro-4-methylsulfonylbenzoic acid was prepared from 4-toluene sulfonyl chloride by the reaction of Alkylation (in the condition of sodium sulfite and baking soda), Nitrification (in the condition of nitric acid and vitriol) and Oxidation reaction (in the condition of nitric acid and catalyzer).

研究了以对甲苯磺酰氯为起始原料，首先通过亚硫酸钠和碳酸氢钠的水溶液进行烷基化、其次在浓硝酸和浓硫酸加热回流的条件下峭化、最后在浓硝酸和催化剂的条件下进行氧化，3步反应合成了玉米田高效除草剂甲基磺草酮的重要中间体2-硝基－4-甲磺酰基苯甲酸。

Using 1-amino-2-phenoxy-4-hydroxyanthraquinone, chlorosulfonic acid ,thionyl chloride,and 3-ethoxypropylamine as raw materials and sodium carbonate as acid-binding agent,C.

以1-氨基-2-苯氧基-4-羟基蒽醌、氯磺酸、氯化亚砜、3-乙氧基丙胺为原料及Na2CO3为缚酸剂合成了C.I。分散红92。

The intermediate was synthesized by using O cresol , phthalide, thionyl chloride, and sodium cyanide as raw materials.

以苯酞和邻甲酚为起始原料，生成物经酰氯化、酰氰化、水解反应得苯基草酸甲酯衍生物，再与甲氧基氨盐酸反应得Z/E构型混合物。

Compared with uncropped saline waste land, contents of chloride and sodium, the ratio of Cl- to SO42- and SAR in the layer of below 40 cm under mulch-drip irrigation increase.

与盐碱荒地相比，滴灌种植以后40 cm以下土层Cl-含量、Na+含量、Cl-/ SO42-、钠吸附比均增加了。

The result indicated that manganese chloride,acetylacetone,sodium hydroxide,were grinded for 15 mins at room temperature with the molar ratio of 1∶4∶1.8,the yield of manganese ac...

结果表明：氯化锰、乙酰丙酮、固体NaOH按1∶4∶1.8的摩尔比，在室温下研磨15 min所得产率最高，产率为68%，比传统液相法的产率(25%)高出43%。

A UV\|spectrophotometry method was used to determine the content of brightener benzalacetone in potassium chloride zinc electroplating , and many factors affecting the UV absorption were studied such as pH, inorganic salt, sodium higher fatty alcohol polyoxyethylene sulphate, etc.

研究了酸度、无机盐、高级脂肪醇聚氧乙烯醚硫酸钠等对氯化钾型镀锌主光亮剂苄叉丙酮吸光度的影响。

The study is to synthesize dual-site phase-transfer catalyst, and use it to form tri-liquid phases, and investigate the catalytic benzoylation of 4'-hydroxyacetophenone sodium salt and benzoyl chloride to produce 4-acetylphenyl benzoate in ultrasound-assisted tri-liquid-phase system.

中文摘要本研究在合成双活性基相间转移触媒，并使用该触媒合成三液相系统，并辅以超音波在三液相系统中催化4-乙醯基酚化钠与氯化苯甲醯形成苯甲酸4-乙醯基苯酯的反应。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷