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Microbiological Reference Materials

Reference materials (RM) are used to check the quality of analyses. These materials are used to check the quality of microbiological analyses. Results can be plotted on a control card, so analysts can see whether quality is adequately assured.

CHEK has earned formal accreditation from the Dutch Accreditation Council for the production of eleven microbiological reference materials (registration code P001). Our scope is available on their website at www.rva.nl.

Process
All microbiological reference materials are tested and guaranteed for homogeneity and stability. Our procedures comply with the requirements of the International Standard ISO Guide 34:2009 (General requirements for the competence of reference material producers). These materials can be ordered at any time. As soon as the order is verified along with your information, the materials will be shipped on dry ice. The reference materials are accompanied by a certificate, which provides the property values and all the relevant information. All microbiological reference materials are stored at –80°C and packed per 10 vials of 1.5 ml. Most of the microbiological reference materials have a one-year shelf life. For more information download the User manual for microbiological reference materials.

Available reference materials
CHEK developed and offers 16 different kinds of microbiological reference materials in milk. The expected range is between 100 - 10.000 cfu/ml, depending on the method used. The next microbiological reference materials are available: 

RM	Micro-organism	MSDS
BC	Bacillus cereus	MSDS-BC
CAMP	Campylobacter jejuni	MSDS not available yet
CP	Clostridium perfringens	MSDS-CP
CS	Cronobacter sakazakii (Enterobacter sakazakii)	MSDS-CS
EF	Enterococcus faecalis	MSDS-EF
EC	Escherichia coli	MSDS-EC
EC O.157	Escherichia coli O.157 (non-VTEC)	MSDS-EC O.157
LP	Lactobacillus plantarum	MSDS-LP
LM	Listeria monocytogenes	MSDS-LM
PAU	Penicillium aurantiogriseum	MSDS-PAU
PF	Pseudomonas fluorescens	MSDS-PF
SAG	Salmonella agona (lactose positive)	MSDS-SAG
SE	Salmonella enteritidis	MSDS-SE
SA	Staphylococcus aureus	MSDS-SA
WM	Wallemia sebi (xerophile mould)	MSDS not available yet
YL	Yarrowia lipolytica	MSDS-YL

Costs
In 2012 each pack of 10 vials is priced at €27, not including shipping costs. See shipment for the shipping costs. Invoices are sent by postal services. Payment must be made by cheque or bank transfer and does not take place by means of the internet.

Order
If you wish to order reference materials, please fill in the order form. A confirmation will be sent when materials are ordered. As soon as the order is verified along with your information, the materials will be shipped. Delivery can usually be expected within three weeks of ordering. A fax or e-mail is sent at the day of shipping and within two days the materials should arrive at the given address. All materials are shipped on dry ice.

By sending the order form clients agree with the terms and conditions. For additional information please contact Mrs Annemarie Mulder by e-mail (chek@vwa.nl) or phone (+31 (0)88 223 33 33).

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