Телефон: (011) 7541-421, 3409-301, 3409-335, 6547-293, 3409-310
E-mail: Продаја стандарда: prodaja@iss.rs Семинари, обуке: iss-edukacija@iss.rs Информације о стандардима: infocentar@iss.rs
Стевана Бракуса 2, 11030 Београд
Главни мени

ISO 14461-2:2005

Milk and milk products — Quality control in microbiological laboratories — Part 2: Determination of the reliability of colony counts of parallel plates and subsequent dilution steps
12. 4. 2005.

Опште информације

90.93     23. 9. 2020.

ISO

ISO/TC 34/SC 5

Међународни стандард

07.100.30  

енглески  

Куповина

Објављен

Језик на коме желите да примите документ.

Апстракт

ISO 14461-2|IDF 169-2:2005 describes a routine procedure for the evaluation of results of the enumeration of microorganisms using colony-count methods with subsequent 10-fold dilution steps and one plate or two parallel plates within each dilution step.
This routine procedure is applied regularly in each laboratory performing colony counts. It provides criteria for the acceptability of differences between the results from parallel plates and subsequent dilution steps, as follows.
The results (colony counts) obtained from parallel plates are compared with tabulated limits for given colony counts. If these limits are exceeded, a technical problem when performing the parallel determinations may be indicated.
The results (sums of colony counts) of two parallel plates of two subsequent 10-fold dilution steps are compared with tabulated limits for given sums of colony counts. If these limits are exceeded, a technical problem when performing the dilutions may be indicated.
If the limits mentioned above are exceeded in more cases than expected, this indicates that the test procedure lacks reliability.

Животни циклус

ТРЕНУТНО

ОБЈАВЉЕН
ISO 14461-2:2005
90.93 Одлука о потврђивању стандарда
23. 9. 2020.

Национална преузимања

Mleko i proizvodi od mleka — Kontrola kvaliteta u mikrobiološkim laboratorijama — Deo 2: Određivanje pouzdanosti brojanja kolonija na paralelnim pločama i koraka pri razblaživanju koji slede

90.93 Одлука о потврђивању стандарда