In the present work we have studied the stability of thiamine by HPLC in parenteral nutritions provided with or without lipids. As source of nitrogen we have used Freamine 8.5%. Thiamine came from the multi-vitamin complex Pancebrin. The results of this study show that this vitamin is not stable for more than 24 h, even if parenteral nutritions are kept at 4 degrees C, except for solutions that do not contain lipids and are kept at 4 degrees C. Light does not influence the degradation rate of thiamine.
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