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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 30, Number 5
BKCSDE 30(5)
May 20, 2009

Title	Sampling Methods for Quantification of Solid-state Phases in Powder Samples with Solid-state NMR Spectroscopy
Author	Oc Hee Han*, Sun Ha Kim, Tae Jung Ko
Keywords	Solid-state NMR, Quantification, Solid-state phase, Powder sample, Polymorph
Abstract	To minimize the variance in the quantification of solid-state phases in powder samples, gently placing polycrystalline samples one next to another directly in a sample holder is better than trying to mix them homogeneously prior to transferring to a sample holder. However, the solid-state cross polarization-magic angle spinning (CP-MAS) nuclear magnetic resonance (NMR) spectroscopy results demonstrated that it is essential in this sampling method to place all the samples in the location of consistent signal sensitivity. The same sampling method may be employed in other spectroscopic quantification techniques of solid-state phases if the method to limit the sample to the location with uniform signal sensitivity in the sample holder is adapted to each technique.
Page	1077 - 1079
Full Text	PDF

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