These cocktails are either made from reagents or purchased in concentrated form and diluted with toluene . 这些混合液或是由试剂配制的或是买来的用甲苯稀释的浓缩剂。
Development and application of a high efficiency oily sludge concentration agent 高效含油污泥浓缩剂的研制与应用
Chinese company had identified the additive as glycerin , a safe sweetener and thickener . but it was really diethylene glycol , a low - cost substitute commonly used in automobile antifreeze 一家中国公司将添加剂标注成甘油,这是一种安全的甜味剂和浓缩剂。然而实际是确实二次乙基乙二醇,它作为一种廉价的替代品而被广泛用作汽车的防冻剂。