| 分光光度法测定魔芋粉中葡甘露聚糖含量的不确定度评定 |
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| 引用本文： | 姚佳,迟天顺. 分光光度法测定魔芋粉中葡甘露聚糖含量的不确定度评定[J]. 现代食品, 2020, 5(10): 182-186 |
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| 作者姓名： | 姚佳 迟天顺 |
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| 作者单位： | 云南省产品质量监督检验研究院,云南 昆明 650000 |
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| 摘 要： | 对3,5-二硝基水杨酸分光光度法测定魔芋粉中葡甘露聚糖过程中引入的不确定度进行系统分析,结果表明,标准曲线制备、拟合标准曲线以及紫外分光光度计引入的不确定度影响较大,试样制备过程和试样重复测定次之。当取置信概率为95%时,其测定结果及不确定度为(70.6±1.57)%,k=2。
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| 关 键 词： | 不确定度评定 水杨酸分光光度法 魔芋粉中葡甘露聚糖 |
Evaluation of Uncertainty in the Determination of Glucomannan in Konjac Powder by Spectrophotometry |
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| Yao Jia,Chi Tianshun. Evaluation of Uncertainty in the Determination of Glucomannan in Konjac Powder by Spectrophotometry[J]. Modern Food, 2020, 5(10): 182-186 |
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| Authors: | Yao Jia Chi Tianshun |
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| Affiliation: | (Yunnan Product Quality Supervision and Inspection Institute,Kunming 650000,China) |
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| Abstract: | The uncertainty introduced in the process of 3,5-dinitrosalicylic acid spectrophotometric determination of glucomannan in konjac powder was systematically analyzed.The results showed that the uncertainty of preparation of standard curve,fitting of standard curve and introduction of ultraviolet spectrophotometer had great influence,and the sample preparation process and sample repeated determination were the second.When the confidence probability is 95%,the result and uncertainty are(70.6±1.57)%,k=2. |
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| Keywords: | Evaluation of uncertainty Salicylic acid spectrophotometry Glucomannan in konjac powder. |
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