Calibration powders were developed using combinations of milk ingredients for the purpose of calibration of infrared milk analyzers. They were shown to be capable of producing calibrations very similar to conventional calibration milks available commercially. A subsequent collaborative study was carried out involving nine laboratories to assess the performance of the preformulated powders in industrial quality control, payment and dairy herd analysis laboratories. The calibration powders were shown to produce consistent calibrations within laboratories and between laboratories and met AOAC specifications in terms of accuracy and repeatability. The reconstituted solutions were shown to be stable for up to 6 h at 40$ sp circ$C and could be stored under refrigerated conditions and used for repeated analyses for up to 21 days without apparent deterioration in calibration performance. It was concluded that the calibration powders perform as well as conventional calibrants, were more consistent overall and suitable for any calibration application. The calibration powders have the stability and performance characteristics to serve as reference standards for monitoring instrument performance and would be a useful tool for accrediting payment and dairy herd analysis laboratories.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.59816 |
| Date | January 1990 |
| Creators | Elkashef, Abdelaziz A. |
| Contributors | Van de Voort, F. R. (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Food Science and Agricultural Chemistry.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001116829, proquestno: AAIMM66423, Theses scanned by UMI/ProQuest. |
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