Determination of dry matter content in potato tubers by low-field nuclear magnetic resonance (LF-NMR)

TY - JOUR

T1 - Determination of dry matter content in potato tubers by low-field nuclear magnetic resonance (LF-NMR)

AU - Hansen, Christian Lyndgaard

AU - Thybo, Anette

AU - Bertram, Hanne Christine S.

AU - Viereck, Nanna

AU - van der Berg, Franciscus Winfried J

AU - Engelsen, Søren Balling

PY - 2010/10/13

Y1 - 2010/10/13

N2 - The objective of this study was to develop a calibration model between time-domain low-field nuclear magnetic resonance (LF-NMR) measurements and dry matter (DM) content in single potatoes. An extensive sampling procedure was used to collect 210 potatoes from eight cultivars with a wide range in DM content, ranging from 16 to 28%. The exponential NMR relaxation curves were resolved into four mono-exponential components using a number of solution diagnostics. Partial least-squares (PLS) regression between NMR parameters (relaxation time constants T2,1-4 and magnitudes M0,1-4) and DM content resulted in a model with low error (RMSECV, 0.71; RMSEP, 0.60) and high correlation (rCV, 0.97; rtest, 0.98) between predicted and actual DM content. Correlation between DM content and each of the proton populations revealed that M0,1 (T2,1, 3.6ms; SD, 0.3 ms; r, 0.95) and M0,4 (T2,4, 508 ms; SD, 53 ms; r, -0.90) were the major contributors to the PLS regression model.

AB - The objective of this study was to develop a calibration model between time-domain low-field nuclear magnetic resonance (LF-NMR) measurements and dry matter (DM) content in single potatoes. An extensive sampling procedure was used to collect 210 potatoes from eight cultivars with a wide range in DM content, ranging from 16 to 28%. The exponential NMR relaxation curves were resolved into four mono-exponential components using a number of solution diagnostics. Partial least-squares (PLS) regression between NMR parameters (relaxation time constants T2,1-4 and magnitudes M0,1-4) and DM content resulted in a model with low error (RMSECV, 0.71; RMSEP, 0.60) and high correlation (rCV, 0.97; rtest, 0.98) between predicted and actual DM content. Correlation between DM content and each of the proton populations revealed that M0,1 (T2,1, 3.6ms; SD, 0.3 ms; r, 0.95) and M0,4 (T2,4, 508 ms; SD, 53 ms; r, -0.90) were the major contributors to the PLS regression model.

U2 - 10.1021/jf101319q

DO - 10.1021/jf101319q

M3 - Journal article

C2 - 20853901

SN - 0021-8561

VL - 58

SP - 10300

EP - 10304

JO - Journal of Agricultural and Food Chemistry

JF - Journal of Agricultural and Food Chemistry

IS - 19

ER -