Quality Analysis of Dairy Products Based on Unilateral Nuclear Magnetic Resonance

doi:10.7506/spkx1002-6630-201622023

Abstract

Abstract: In this study, unilateral fully-opened nuclear magnetic resonance technique was used to detect milk adulteration and to monitor boxed yogurt stored at room temperature. Static gradient spin echo carr-purcell-meiboom-gill (SGSE-CPMG) sequence was used to measure the transverse relaxation time (T2CPMG) of each sample under inhomogeneous magnetic field. Then the transverse relaxation time (T2) of the test sample was obtained by relaxation correction. The results showed that the T2CPMG of sadulterated samples increased with increasing adulterant concentration in static gradient field and the changes in T2 peak of boxed yogurt after relaxation correction could reflect its freshness. Therefore, single sided nuclear magnetic resonance technology can allow fast and nondestructive detection of the quality of dairy products, and the hardware is simple and portable (or installed) for real-time on-site detection.

Key words: unilateral nuclear magnetic resonance, nondestructive detection, dairy products, transverse relaxation time (T2)

CLC Number:

TS207.7

MIAO Zhiying, XIA Tian, CHEN Shanshan, WANG Hongzhi,*, MA Junshan,*. Quality Analysis of Dairy Products Based on Unilateral Nuclear Magnetic Resonance[J]. FOOD SCIENCE, 2016, 37(22): 155-159.

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