二甲苯

Methods 151 cars used for different periods of time were selected and the concentrations of formaldehyde,benzene,toluene,dimethylbenzene and TVOC were detected.

方法选择使用不同年限的151辆小汽车，分别测定车厢空气中甲醛、苯、甲苯、二甲苯、TVOC的浓度，同时对驾驶人员的不良反应进行调查。

Objective To establish a gas chromatography method which will be suitable for determination of one time of the benzene, toluene, dimethylbenzene in the adhesives.

目的 建立适用于同时测定常用溶剂型胶粘剂中苯、甲苯、二甲苯含量的气相色谱分析方法。

The method is accurate, feasible and suitable for determination of the benzene, toluene, dimethylbenzene in the adhesives.

RSD为1.60%~2.85%。结论该方法适用于同时测定常用溶剂型胶粘剂中苯、甲苯、二甲苯的检测，方法准确、可靠。

Methods The time-weighted average concentration Short-term exposure limits of benzene and toluene and dimethylbenzene in 10 furniture factories were measured.

对10家家具厂工作场所中苯、甲苯、二甲苯进行时间加权平均浓度和短时间平均浓度测定。

Methods To detect benzene,methylbenzene, dimethylbenzene ,and formaldehyde levels in indoor air of 48 rooms decorated in different seasons.

方法在春夏季(4~9月)和秋冬季(1~3月，10~12月)选择装修完毕3个月左右尚未入住的居室48户，检测室内空气中的苯、甲苯、二甲苯和甲醛浓度，并进行比较。

The effect of the content of intercalatant and MMT on the absorption speed and degree of the composites in dimethylbenzene was studied and compared with gum BIIR and the traditional BIIR/Na-MMT composites.

因此研究了插层剂用量和蒙脱土用量对于复合材料在其良溶剂二甲苯中的溶胀速度和程度，并与BIIR纯胶和BIIR/Na-MMT复合材料进行比较。

The quantitative analysis of the mixture of butyl acetate, dimethylbenzene and benzene is done with gas chromatography, taking methyl formate as internal standard.

采用气相色谱法，以甲酸甲酯为内标物，对在所研制催化剂作用下氧化反应前后的醋酸丁酯、二甲苯和苯进行了一次定量分析。

Recent method of synthesizing 3,5-xylenol is sulpho alkaline fusion of dimethylbenzene, it is a very complicated procedure with serious pollution and low-pure products.

国内目前生产工艺是间二甲苯的磺化碱熔法，该方法工艺过程复杂、污染严重，并且产品纯度不高。

The recovery of dimethylbenzene and butylacetate from industrial spent solvent oil by batch distillation was studied,and the batch distillation experiment was performed with pretreated material.

研究采用间歇精馏法从工业废溶剂油中回收二甲苯和醋酸丁酯，对预处理后的原料进行了间歇精馏工艺实验研究。

The method is mainly according to GB/T 11737-1989 "sanitation test standard method for benzene, toluene and dimethylbenzene in air for residential area, gas chromatograph method".

本方法主要依据GB/T 11737-1989《居住区大气中苯、甲苯和二甲苯卫生检验标准方法气相色谱法》。

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。