Evaluation of the Measurement Uncertainty for Total Amount Determination of Free Amino Acids in Tea

XIE Ying-ying

doi:10.16779/j.cnki.1003-5508.2019.03.023

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Volume 40 Issue 3

Nov. 2019

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Article Navigation > Journal of Sichuan Forestry Science and Technology > 2019 > 40(3): 109-114

XIE Ying-ying. Evaluation of the Measurement Uncertainty for Total Amount Determination of Free Amino Acids in Tea[J]. Journal of Sichuan Forestry Science and Technology, 2019, 40(3): 109-114. doi: 10.16779/j.cnki.1003-5508.2019.03.023

Citation:

XIE Ying-ying. Evaluation of the Measurement Uncertainty for Total Amount Determination of Free Amino Acids in Tea[J]. Journal of Sichuan Forestry Science and Technology, 2019, 40(3): 109-114. doi: 10.16779/j.cnki.1003-5508.2019.03.023

Evaluation of the Measurement Uncertainty for Total Amount Determination of Free Amino Acids in Tea

doi: 10.16779/j.cnki.1003-5508.2019.03.023

XIE Ying-ying^1,2

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National Tea Quality Supervision and Inspection Center(Sichuan), Ya'an 625000;Sichuan Ya'an Municipal Product Quality Supervision and Inspection Institute, Ya'an 625000

Received Date: 2019-02-27

Abstract

The spectrophotometric determination method was adopted to analyze the measurement for the determination of total amount of free amino acids in tea.According to the relevant regulations documented in the《Evaluation and Expression of Uncertainty in Measurement》(JJF 1059.1-2012),the source of the uncertainty in the detection processwas identified,and the uncertainty calculation formula was deduced.Comparing the different effects of various factors on the measure results,it was found that the standard curve fitting had the biggest impact on the uncertainty.This finding made contribution to improving the quality of data measurement.
- Uncertainty;
- Spectrophotometry;
- Tea;
- Total amount of free amino acids

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Evaluation of the Measurement Uncertainty for Total Amount Determination of Free Amino Acids in Tea

doi: 10.16779/j.cnki.1003-5508.2019.03.023

XIE Ying-ying^1,2

National Tea Quality Supervision and Inspection Center(Sichuan), Ya'an 625000;Sichuan Ya'an Municipal Product Quality Supervision and Inspection Institute, Ya'an 625000

Received Date: 2019-02-27

Key words:

Abstract: The spectrophotometric determination method was adopted to analyze the measurement for the determination of total amount of free amino acids in tea.According to the relevant regulations documented in the《Evaluation and Expression of Uncertainty in Measurement》(JJF 1059.1-2012),the source of the uncertainty in the detection processwas identified,and the uncertainty calculation formula was deduced.Comparing the different effects of various factors on the measure results,it was found that the standard curve fitting had the biggest impact on the uncertainty.This finding made contribution to improving the quality of data measurement.