Microbiological Analysis


Sæmundur Sveinsson

Research Group Leader


Matís conducts microbiological research on food, drinking water, medicines, feed and environmental samples, providing specialized, high-quality and fast service and advice to public bodies, food companies, pharmaceutical companies, slaughterhouses and the private sector. 

In addition to microbiological measurements that determine life expectancy using many different methods, Matís' laboratory serves customers with measurements that:

  • Give evidence of hygiene
  • Freshness
  • Shelf life
  • Efficacy of efficient microbial growth
  • Indicate the safety of the product
  • Examine pathogenic microorganisms

Frequently asked questions about drinking water research

Matís is accredited by Swedac, the Swedish accreditation body, for 30 microbial methods for measuring food, water, feed, environmental samples and medicines.

From the New York State Department of Health, Matís / Reykjavík is accredited for 2 methods for measuring bottled water.

Do you need accredited microbiological analysis?

Water methods

Total count at 22°CISO 6222:1999, Std Methods 2017, 9215 B
Total count at 35°C ISO 6222:1999, Std Methods 2017, 9215 B
Total count at 37°CSO 6222:1999, Std Methods 2017, 9215 B, D
ColiformsISO 9308-1: 1990
Faecal coliformsISO 9308-1: 1990
Escherichia coliISO 9308-1:1990/ISO 9808-1:2000/Cor 1:2007
EnterococciISO 7899-2:2000
Sulfite-reducing clostridiaISO 6461-2:1986
Pseudomonas aeruginosa EN-ISO 16266:2008
Yeast and moldPh.Eur. 10th Ed, 2.6.12
Total bacterial countPh.Eur. 10th Ed, 2.6.12
*LegionellaISO 11731: 2017
* Starred measurements have not been accredited according to the ISO 17025 standard

Food methods

Total count at 7°C, 22°C and 30°CNMKL 86, 2013
ColiformsNMKL 44, 2004 / NMKL 96, 2009 / NMKL 125, 2005
Faecal coliformsNMKL 44, 2004 / NMKL 96, 2009
Escherichia coli NMKL 44, 2004 / NMKL 96, 2009 / NMKL 125, 2005
Intestinal bacteria (Enterobacteriaceae)NMKL 144, 2005
Presumptive Bacillus cereusNMKL 67, 2010
Coagulase positive staphylococciNMKL 66, 2009
Clostridium perfringensNMKL 95, 2009
Listeria monocytogenes positive/negativeNMKL 136, 2010
Listeria monocytogenes countNMKL 136, 2010
Salmonella positive/negativeNMKL 71, 1999 / ISO 6579-1:2017/A1:2020
Salmonella positive/negativeNMKL 187, 2016
*Sulfite-reducing clostridiaNMKL 56, 2014
Heat resistant Campylobacter positive/negative, species identificationNMKL 119, 2007
Heat resistant Campylobacterindoor method: ÖS 6:2017
*E.coli O157 positive/negativeNMKL 164, 2005
*Gram negative bacteria in picklesIndoor method
*Heat resistant bacteriaNMKL 86, 2013
*Life number, specialized pouring method, surface seeding on iron oreNMKL 184, 2006
*Life number, black colonies on iron agarNMKL 184, 2006
*Lactic acid bacteriaNMKL 140, 2007
Mold and yeastsNMKL 98, 2005, mod
*Erythema bacteriaHP Dussault and RA Lachance, 1952
*Pathogenic VibrioNMKL 156, 1997
B-glucuronidase positive E.coliISO TC 16649-3:2015
* AeromonasNMKL 150, 2004
* Starred measurements have not been accredited according to the ISO 17025 standard

Pharmaceutical methods and methods for pharmaceutical water. Sources: European pharmacopoeia

Vitality at 30°CPh.D. Eur. 11th Ed. 2.6.12
Yeast and mold 22°CPh.D. Eur. 11th Ed. 2.6.12
Escherichia coli positive/negativePh.D. Eur. 11th Ed. 2.6.13
Salmonella positive/negativePh.D. Eur. 11th Ed. 2.6.13
Pseudomonas aeruginosa positive/negativePh.D. Eur. 11th Ed. 2.6.13
Staphylococcus aureus positive/negativePh.D. Eur. 11th Ed. 2.6.12
*Bile resistant gram negative bacteriaPh.D. Eur. 11th Ed. 2.6.13
*Checking the sterilization of medicinesPh.D. Eur. 11th Ed. 2.6.1
* Starred measurements have not been accredited according to the ISO 17025 standard

Frequently Asked Questions

Is Matís researching the health of drinking water?

Yes! Matís ohf's microbiology department investigates whether drinking water is healthy. Generally, the total bacterial count at 22°C coliforms and E.coli is studied. It is also possible to obtain physical measurements of the water such as acidity and conductivity.

Contact: Hrólfur Sigurðsson


How long does it take to have the health of drinking water tested?

It takes 3 days to study the health of drinking water.

Contact: Hrólfur Sigurðsson


Do I need to take a sample of drinking water in a special sampling bottle?

Yes, it is necessary that the sample be taken in a sterile sampling tube. Such a glass can be obtained from Örverudeild Matís ohf or buy two sterile urine test tubes from the nearest pharmacy.

Contact: Hrólfur Sigurðsson


Do you perform autoclaves testing for beauty salons and dentists?

Yes, it is possible to order special bacterial spores that we send to customers. The customer puts these spores in his autoclave and then sends them back to us. We confirm whether their autoclave has managed to kill the spores in question.

Contact: Páll Steinþórsson


Does Matís ohf sell prepared media in petri dishes for bacteria and mold?

Yes, we produce a variety of prepared media in petri dishes which can be ordered by our customers.

Contact: Páll Steinþórsson