Galacturonic acid monohydrate

R. M. Me Cready, D-Galacturonic acid monohydrate, Methods. Carbohydr. Chem., 2 (1963) 27-29. 

Crystalline a-D-galacturonic acid monohydrate has been studied by C CPMAS NMR and X-ray crystallography. The molecular dynamics have been investigated by evaluating C spin-lattice relaxation in the rotating frame (Tip) and CSA properties of each carbon. It has been found that only limited molecular motions can be detected in the low frequency (<10 Hz) range by Tip( C) measurements and changes of CSA properties as a function of temperature. 

Prepare stock 10 mM galacturonic acid solution by dissolving 0.2122 g D-galac-turonic acid monohydrate in 100 ml of 20 mM sodium acetate buffer, pH 5.0 (appendix 2A). Dilute this stock solution 10-fold with buffer. Store up to 1 week at 4°C. 

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