菸酸与二乙胺、三氯氧磷作用，再经氢氧化钠中和，加入纯碱使反应液中的产品与水分层，取代有机溶剂萃取工艺，简化了操作，降低了消。
Instead of extracted by organic solvents, sodium carbonate was used to separate the product and water, thus the following press was simpler and the cost was lower.
聚合物和颜料在前面已经讨论过，混合溶剂是水溶性的乙二醇醚类， 它有助树脂在水中的水分散和提高涂膜的均一性。
The polymers and pigments have been discussed previously. Coalescing solvents are water-miscible glycol ethers which aid in the water-dispersibility of the resin and enhance coating uniformity.
样品前处理采用了先去除样品中水分，再用有机溶剂提取残留农药的方法。
The samples were treated by wiping off water. The pesticides residues were extracted with aceton.
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