食品科学

• 分析检测 • 上一篇    下一篇

α-萘酚-硫酸法测定酒糟多糖含量

张世仙,刘 焱,朱 彬,金 茜,曾启华   

  1. 遵义师范学院化学化工学院,黔北特色资源应用研究实验室,贵州 遵义 563002
  • 出版日期:2013-09-25 发布日期:2013-09-27

Determination of Polysaccharides from Vinasse by α-Naphthol-Sulfuric Acid Method

ZHANG Shi-xian,LIU Yan,ZHU Bin,JIN Qian,ZENG Qi-hua   

  1. Laboratory of Utilization Research on Characteristic Resources in Qianbei, School of Chemistry and Chemical Engineering, Zunyi Normal College, Zunyi 563002, China
  • Online:2013-09-25 Published:2013-09-27

摘要:

目的:从酒糟中提取多糖,并建立一种操作简单、结果可靠的检测酒糟多糖含量的方法。方法:采用酶法提取酒糟多糖,用α-萘酚-硫酸显色法测定多糖含量。结果:溶液最大吸收波长为560nm,在6~36μg/mL范围内吸光度与被测物含量呈良好的线性关系,R2=0.9975,平均加标回收率100.65%,以葡萄糖计,酒糟中多糖含量为10.6%,RSD为4.0%。结论:α-萘酚-硫酸显色法测定酒糟多糖含量步骤简单,重复性好,结果可靠。

关键词: 酒糟, 多糖, &alpha, -萘酚-硫酸法

Abstract:

Objective: To extract polysaccharides from vinasse (byproduct of Chinese liquor making) and to establish a
simple and reliable determination method. Methods: Vinasse polysaccharides were extracted by an enzymatic method,
and α-naphthol-sulfuric acid method was used for the determination of polysaccharide content. Results: The maximum
absorption wavelength was 560 nm. There was a good linear relationship between absorbance and glucose concentration in
the range from 6 to 36 μg/mL (R2 = 0.9975). The average spiked recovery rate was 100.65%. The content of polysaccharides
from vinasse (caculated as glucose) was 10.6% (RSD = 4.0%). Conclusion: The α-naphthol-sulfuric acid method is a simple
and reliable assay with good reproducibility for determining polysaccharides from vinasse.

Key words: vinasse;polysaccharides;&alpha, -naphthol-sulfuric acid method