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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.

国内目前艺是间二甲苯的磺化碱熔法,该方法艺过程复杂、污染严,并且品纯度不高。

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By using sulpho acid to dissociate samples, using spectrophotometric method to determine micro-chrome in drainage sedimentary is very easy and simple with low cost.

采用王水分解样品,分光光度法测定水物样品中微量铬,方法简便,易操作,成本低。

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erigeron, erigrisin, erikite, Erilan, Erin, erinaceous, erinadine, erineum, erinite, Erinnidae,

相似单词


3G, 401(K), a,

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