查询词典 formaldehyde

The method has been used to determine Phthalic esters in drinking water and seawater sample. 3. Single drop microextraction, followed by gas chromatography with flame ionization detection has been applied to determine Formaldehyde, Acetaldehyde and Acraldehyde in water based on 2,4-Dinitrophenylhydrazine derivatization. Extraction solvent, extraction time and stirrer speed were optimized. Optimal experimental conditions were as follows: 1.6μL toluene microdrop exposed for 30 min in a 3ml aqueous sample placed in 4ml vial and stirred at 600 rpm/min.

以2，4-二硝基苯肼衍生，单滴液相微萃取与气相色谱火焰光度检测器联用测定水样中的甲醛、乙醛、丙烯醛，考察了萃取溶剂、液滴大小、萃取时间、搅拌速度、盐效应等对该方法的影响，并对影响液相微萃取的各种因素进行了系统的阐述，确定了该体系的最佳实验条件，实现了甲醛、乙醛、丙烯醛的提取和富集。

In order to search for a suitable method for the tissue preservation and DNA isolation of marine animals, the adductor muscle of bay scallop was treated with different methods: frozen at -20 ℃, fixed with 70% ethanol and 10% formaldehyde more than 10 days.

以海湾扇贝为材料，研究了鲜活样品以及采用冷冻保存、70 %乙醇固定和10 %福尔马林固定等方法保存的闭壳肌样品用于DNA提取的不同效果，并分析了不同保存条件下所提得DNA用于RAPD扩增的结果。

Product characteristics : Formaldehyde-scavenger is produced through advanced technics and composition.

甲醛清除剂产品特性：本产品是采用科学配方，先进的生产工艺，生产出的甲醛清除剂。

Resorcinol-formaldehyde aerogel is made in a way similar to production of silica aerogel.

间苯二酚甲醛气凝胶是在一种类似生产白炭黑。

Urea-formaldehyde resins has many advantages such as abundant raw materials, low cost, good agglutinative performance and so on,are most widely used adhesives.

中文摘要：脲醛树脂胶粘剂具有原料丰富、成本低廉、粘结性能好等优点，是木材工业中使用量最大的胶粘剂。

Indoor air pollution prevention;questionnaire survey;spot determine;formaldehyde

室内污染防治；问卷调查；现场检测；甲醛

The nucleophilic attack step of a classical Aldol reaction was studied using acetaldehyde anion and formaldehyde as reactants.

采用乙醛负离子和甲醛作为反应物，对经典的醛醇缩合反应中的亲核进攻步骤进行了研究。

It contains formaldehyde, aluminum hydroxide, and 2-phenoxyethanol, a toxic chemical comparable to antifreeze.

包含了甲醛，铝的氢氧化物，以及2-含苯氧基乙醇，一种可以与防冻剂类比的有毒化学物质。

Yao Liangsong thinks, at present ambry is in make, the contaminative problem in installing a process is more serious, formaldehyde exceeds mark, plank not the odour that environmental protection, paint sends out bring about air quality pollution to be underestimated greatly by consumer.

姚良松认为，目前橱柜在制作、安装过程中的污染问题是比较严重的，甲醛超标、板材不环保、油漆散发的气味等导致空气质量污染被消费者大大低估了。

N,N-Dimethyl dodecylamine was synthesized with dodecyl amine, formic acid and formaldehyde as raw material in this article.

以十二胺、甲酸和甲醛为原料，合成了N，N-二甲基十二烷基叔胺。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。