Document Detail

Assessment of ascorbic acid stability in different multilayered parenteral nutrition bags: critical influence of the bag wall material.
MedLine Citation:
PMID:  15772391     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The recent development of multilayered bags has minimized ascorbic acid oxidation in parenteral nutrition (PN) admixtures. However, the gas-barrier property of multilayered bags depends on their plastic material. This study compared ascorbic acid stability in different multilayered bags under experimental conditions. METHODS: Oxygen permeability of a newly developed 6-layered bag (6-L) was compared with a highly mechanical-resistant 3-layered bag (3-L(R)) and a highly flexible 3-layered bag (3-L(F)) using gas chromatography. Ascorbic acid stability was assessed by iodine titration in bags filled with 2.5 L H(2)O and 40 g carbohydrates after setting residual O(2) content at < or =1 or > or =5 ppm. The effect of storage at 4 degrees C, 21 degrees C, and 40 degrees C on ascorbic acid stability was assessed over 48 hours in a complete PN admixture (ie, 330 g carbohydrates, 100 g lipids, 96 g amino acids and trace elements) using high-pressure liquid chromatography. RESULTS: Oxygen permeability was markedly reduced in 6-L bags (0.5 mL O(2) /m(2)/d) compared with 3-L(R) (150 mL O(2) /m(2)/d) and 3-L(R) (1500 mL O(2)/m(2)/d). Accordingly, ascorbic acid was more stable in 6-L bags (half-life [T(1/2)] = 16 days up to 40 degrees C) than in 3-L(R) (T(1/2) = 9 days at 4 degrees C, 47 hours at 21 degrees C and 29 hours at 40 degrees C) and 3-L(F) (T(1/2) = 15 hours at 4 degrees C, 10 hours at 21 degrees C, and 6 hours at 40 degrees C). During the first 6 hours after PN admixture compounding, an additive ascorbic acid loss of 4.6 +/- 0.5 mg/L/ppm O(2) occurred because of residual O(2) in the bag. CONCLUSIONS: The new combination of plastic layers and careful O(2) monitoring during the filling process allowed near to complete prevention of ascorbic acid degradation in multilayered PN bags during 48 hours, regardless of the storage temperature.
Yves M Dupertuis; Sihan Ramseyer; Marc Fathi; Claude Pichard
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  JPEN. Journal of parenteral and enteral nutrition     Volume:  29     ISSN:  0148-6071     ISO Abbreviation:  JPEN J Parenter Enteral Nutr     Publication Date:    2005 Mar-Apr
Date Detail:
Created Date:  2005-03-17     Completed Date:  2005-09-01     Revised Date:  2007-02-21    
Medline Journal Info:
Nlm Unique ID:  7804134     Medline TA:  JPEN J Parenter Enteral Nutr     Country:  United States    
Other Details:
Languages:  eng     Pagination:  125-30     Citation Subset:  IM    
Clinical Nutrition and Central Laboratory of Medical Chemistry, Geneva University Hospital, CH-1211 Geneva 14, Switzerland.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Ascorbic Acid / analysis,  chemistry*
Chromatography, Gas
Chromatography, High Pressure Liquid
Drug Packaging
Drug Stability
Drug Storage
Food, Formulated / analysis*,  standards*
Oxygen / analysis,  chemistry*
Parenteral Nutrition / instrumentation*,  methods
Time Factors
Reg. No./Substance:
50-81-7/Ascorbic Acid; 7782-44-7/Oxygen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Microbiologic quality-control study for the purpose of extending the use of transfer sets on the aut...
Next Document:  Late regeneration of infarcted small bowel mucosa: a case report.