Orthophosphate determination: Interference by mannitol and sorbitol
β Scribed by Chong H. Ho; Shri V. Pande
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- English
- Weight
- 203 KB
- Volume
- 60
- Category
- Article
- ISSN
- 0003-2697
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β¦ Synopsis
Mannitol and sorbitol interfered with the orthophosphate estimation based on the formation of phosphomolybdate complex. Binding of molybdate was the cause of interference as increasing the concentration of ammonium molybdate eliminated the interference. Thus, for the estimation of orthophosphate in the presence of mannitol, the concentration of latter must be kept at below inhibitory level.
π SIMILAR VOLUMES
The method of Berenblum and Chain (1) for analysis of orthophosphate (Pi) and subsequent modifications of this general method (2-4) are valuable and widely used for analysis in the presence of labile phosphoryl compounds and for separation of orthophosphate from mixtures.
## Abstract Alteration of intestinal permeability towards compounds like sugars is an indication of abnormalities observed in some diseases. Measurement of the dual sugar absorption of lactulose and mannitol is a nonβinvasive test of intestinal permeability. The use of this test is however limited
SubbaRow assay procedure. The extent of interference observed is dependent on the pH of the final assay system; small changes in pH at low pH values lead to large variations in the amount of ATP interference. Addition of excess ammonium molybdate and neutralisation of any previous acid additions (su