The content of ethoxyl group in obtained product was 43 . 98 % 该法所得乙基纤维素产品的乙氧基含量为43 . 98 % 。
2.
Standard test method for determination of ethoxyl or hydroxyethoxyl substitution in cellulose ether products by gas chromatography 用气相色谱法测定纤维素醚产品中羟乙基替代物的标准试验方法