{"title":"羧甲基纤维素在整个取代范围内取代度的测定","authors":"R. R. McLaughlin, J. Herbst","doi":"10.1139/CJR50B-089","DOIUrl":null,"url":null,"abstract":"The published methods for the determination of the degree of substitution of carboxymethylcellulose were found to be unsatisfactory for samples of high degree of substitution. Two methods were developed: one comprises the removal of the impurities from crude sodium carboxymethylcellulose by dialysis or washing with ethanol and determination of the sodium content; the other is based on the precipitation of cupric carboxymethylcellulose under controlled conditions, purification, and determination of the copper content.","PeriodicalId":9392,"journal":{"name":"Canadian journal of research","volume":"36 1","pages":"737-744"},"PeriodicalIF":0.0000,"publicationDate":"1950-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"7","resultStr":"{\"title\":\"THE DETERMINATION OF THE DEGREE OF SUBSTITUTION OF CARBOXYMETHYLCELLULOSE OVER THE ENTIRE SUBSTITUTION RANGE\",\"authors\":\"R. R. McLaughlin, J. Herbst\",\"doi\":\"10.1139/CJR50B-089\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The published methods for the determination of the degree of substitution of carboxymethylcellulose were found to be unsatisfactory for samples of high degree of substitution. Two methods were developed: one comprises the removal of the impurities from crude sodium carboxymethylcellulose by dialysis or washing with ethanol and determination of the sodium content; the other is based on the precipitation of cupric carboxymethylcellulose under controlled conditions, purification, and determination of the copper content.\",\"PeriodicalId\":9392,\"journal\":{\"name\":\"Canadian journal of research\",\"volume\":\"36 1\",\"pages\":\"737-744\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1950-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"7\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Canadian journal of research\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1139/CJR50B-089\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Canadian journal of research","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1139/CJR50B-089","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
THE DETERMINATION OF THE DEGREE OF SUBSTITUTION OF CARBOXYMETHYLCELLULOSE OVER THE ENTIRE SUBSTITUTION RANGE
The published methods for the determination of the degree of substitution of carboxymethylcellulose were found to be unsatisfactory for samples of high degree of substitution. Two methods were developed: one comprises the removal of the impurities from crude sodium carboxymethylcellulose by dialysis or washing with ethanol and determination of the sodium content; the other is based on the precipitation of cupric carboxymethylcellulose under controlled conditions, purification, and determination of the copper content.
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