羧甲基纤维素钠取代度的测定方法研究.pdf

第6卷第8期
食品安全质量检测学报
Vol 6 No 8
2015年8月
Journal of Food Salcly and Quality
Aug-,2015
羧甲基纤维素钠取代度的测定方法研究
王香”,翟羽,詹薇
(汤臣倍健股份有限公司,珠海519040
摘要:目的比较灰化法和酸度计法两种检测方法的结果、确定羧甲基纤维素钠取代度的最佳检测法方法。
方法分别采用灰化法、酸度计法检测同一样品的取代度,分析比较结果。结果灰化法结果其取代度相对标
准偏差(IRS)为0.7%,表明该方法具有良好的精密度;酸度计法结果随放置时间的增加,其取代度呈明显上
升的趋势,未能发现明显的突跃点,无法判断其结果,此外,该方法对于不同称样量所测定出的结果不稳定。
结论酸度计法虽操作简便,但是存在放置时间、溶解程度等干扰因素,结果不稳定灰化法虽然操作费时
但结果准确,數据稳定.是测量羧甲基纤维素钠取代度的最佳方法。
关键词:狻甲基纤维素钠;取代度;灰化法;酸度计法
Determination of the degree of substitution of carboxymethyl cellulose sodium
WANG Xiang.ZHAI Yu. ZHAN Wci
( By-1lealth Co, 1td, Zhuhai 519040, China)
ABSTRACT: Objcctive lo determine the best test method of substitution degree of carboxymethy
ellulose sodium by comparison of the results of ashing method and acidity meter method. Mcthods The
substitution degree of the same samples were detected by ashing method and acidity meter method respectivel
and comparing results were analyzed. Results The results determined by ashing method showed the relalive
slandard deviation (RSD %) of subslitution degree was 0.7%, and the method had a good precision. The results
determined by acidity meter method showed that with the increasc of mixing time, the derec of substitution
rose obviously, and signilicanl abrupt point was failed to lind, so thal the resull couldnt be judged. In addition
the method was unstable for the determinalion of samples with diflerent weighl. Conclusion Acidity meter
mcthod is casy to operate, but there are interference factors such as time, drcc of dissolution, leading to
unstable results. Ashing method was time-consuming operalion, but the results are accurale, stable, so il is the
best way to measure (he substitution degree of carboxymethyl cellulose sodium
KEY WORDS: carboxymethylcellulose sodium; degrce of substitution; ashing mcthod; acidity meter mcthod
有实用价值的是它的钠盐,因此通常CMC就是指羧
引言
甲基纤维素钠1
羧甲基纤维素( carboxymethyl cellulose,CMC)是
目前,不同纯度、不同级别和规格的CMC产品
种阴离子、直链、水溶性纤维素醚,可使大多数常在全世界已有300种之多,国外主要生产国有美国、
用水溶液制剂的黏度发生较大変化。在食品エ业中具德国、日本、芬兰、意大利、法国和英国等。因CMC
通讯作者:王香,检验分析员,主要从事保健品领域的常规理化检測。 E-mma11:786863462@qcom
* Corresponding author: WANG Xiane, By-health Co, Ltd, Zhuhai 519040, hina. E-mail: 786863462( qq com