AZIDIOL AS A PRESERVATIVE FOR MILK SAMPLES
Abstract
In order to evaluate the possibility of using the same preserved milk samples for different analysis by milk testing laboratories, it was investigated the use of azidiol (sodium azide/chloramphenicol) as a liquid preservative for chemical, bacteriological and cytological evaluations. Azidiol was added inmediately after milking in half of the samples, the others were used as witness. Analyses were made using an infra-red milk analyzer (Milko-Scan), a Bactoscan and a Fossomatic counter. Life of milk was increased with azidiol as storage temperature was lowered from 20° C to 4° C. Samples for chemical analysis with azidiol could be preserved more than 15 days at 4° C and at least a weed at 20° C. Mean life of samples for bacteriological evaluation in the presence of the preservative varied depending on the temperature of the storage. At 4° C changes were not significant by the Bacto-Scan method and at 20° C milk samples were preserved 3 days (the same time that at 4° C without azidiol). Cytological test gave the same results with and without azidiol when storage temperature was 4° C. However, the mean life of milk with azidiol at 20° C is reduced to 2 days.Downloads
Creative Commons Attribution 4.0
The works published in this journal are subject to the following terms:
1. The Publications Service of the University of Murcia (the publisher) retains the property rights (copyright) of published works, and encourages and enables the reuse of the same under the license specified in paragraph 2.
© Servicio de Publicaciones, Universidad de Murcia, 2019
2. The works are published in the online edition of the journal under a Creative Commons Attribution-NonCommercial 4.0 (legal text). You can copy, use, distribute, transmit and publicly display, provided that: i) you cite the author and the original source of publication (journal, editorial and URL of the work), ii) are not used for commercial purposes, iii ) mentions the existence and specifications of this license.
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
3. Conditions of self-archiving. Is allowed and encouraged the authors to disseminate electronically pre-print versions (version before being evaluated and sent to the journal) and / or post-print (version reviewed and accepted for publication) of their works before publication, as it encourages its earliest circulation and diffusion and thus a possible increase in its citation and scope between the academic community. RoMEO Color: Green.
