[1]刘鹏丽,刘 萍,黄 琛,等.比色法快速测定发酵液中γ-聚谷氨酸含量[J].南京师范大学学报(自然科学版),2019,42(02):105-108.[doi:10.3969/j.issn.1001-4616.2019.02.017]
　Liu Pengli,Liu Ping,Huang Chen,et al.Colorimetric Method for Efficient Determination ofPoly-γ-glutamic Acid in Fermentation Broth[J].Journal of Nanjing Normal University(Natural Science Edition),2019,42(02):105-108.[doi:10.3969/j.issn.1001-4616.2019.02.017]
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比色法快速测定发酵液中γ-聚谷氨酸含量()
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《南京师范大学学报》（自然科学版）[ISSN:1001-4616/CN:32-1239/N]

卷:
第42卷
期数:
2019年02期
页码:
105-108
栏目:
·生命科学·
出版日期:
2019-06-30

文章信息/Info

Title:
Colorimetric Method for Efficient Determination ofPoly-γ-glutamic Acid in Fermentation Broth
文章编号:
1001-4616(2019)02-0105-04
作者:
刘鹏丽; 刘 萍; 黄 琛; 殷志敏
南京师范大学生命科学学院,生物化学与生物制品研究所,江苏省分子医学重点实验室,江苏 南京 210023
Author(s):
Liu Pengli; Liu Ping; Huang Chen; Yin Zhimin
School of Life Sciences,Nanjing Normal University,Institute of Biochemistry and Biological Products,Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology,Nanjing 210023,China
关键词:
γ-聚谷氨酸; 亚甲基蓝; 比色法; 定量分析
Keywords:
poly-γ-glutamic acid; methylene blue; colorimetric method; quantitative analysis
分类号:
Q5-33
DOI:
10.3969/j.issn.1001-4616.2019.02.017
文献标志码:
A
摘要:
建立了发酵液中γ-聚谷氨酸(γ-PGA)含量快速测定的比色检测方法. 其原理为γ-聚谷氨酸可以与亚甲基蓝溶液发生反应,并且使亚甲基蓝溶液颜色发生变化. 配制不同浓度的γ-PGA标准品溶液,使其与亚甲基蓝溶液形成反应体系,并对亚甲基蓝溶液浓度、反应温度以及反应时间对反应体系的影响分别进行对比优化. 结果显示,亚甲基蓝溶液质量浓度为10 mg/L,反应温度为30 ℃,反应时间为5 min,线性回归方程y=0.002 4x+0.328 9,R2=0.996 5,空白加标平均回收率为106.8%,平均RSD值为1.51%,发酵液中加标平均回收率为118.3%,平均RSD值为1.89%. 利用比色法测定发酵液中γ-PGA的含量简便快捷、重现性好、灵敏度较高、准确度好,可用于发酵液中γ-PGA浓度的检测.
Abstract:
A colorimetric method for the rapid determination of γ-PGA in fermentation broth was established. The principle is that poly-γ-glutamic acid can react with the methylene blue solution and change the color of the methylene blue solution. Different concentrations of γ-PGA standard solutions were prepared to form a reaction system with methylene blue solution,and the effects of methylene blue solution concentration,reaction temperature,and reaction time on the reaction system were compared and optimized. The results showed that the mass concentration of methylene blue solution was 10 mg/L,the reaction temperature was 30 ℃,the reaction time was 5 min,the linear regression equation was y=0.002 4x+0.328 9,R2=0.996 5,and the blank average recovery rate was 106.8%. The average RSD value was 1.51%,the average recoveries in the fermentation broth were 118.3%,and the average RSD was 1.89%. The determination of γ-PGA in fermentation broth by colorimetry is simple and rapid,with good reproducibility,high sensitivity and good accuracy. It can be used to detect γ-PGA concentration in fermentation broth.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2018-11-28.
基金项目:江苏省科技厅前瞻性研究项目(BY2013001-03).
通讯联系人:刘鹏丽,硕士研究生,研究方向:生物化学与分子生物学. E-mail:963116134@qq.com
更新日期/Last Update: 2019-06-30