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Reference Material​

A line of microbiology CRMs that are easy to use, traceable - never more than two passages from the primary culture, and quality assured to ISO 17034 and ISO 17025. Both multiplex and single-organism CRMs are available and a convenient universal water microbe cocktail suitable for many different environmental methods. 

For inquiries and assistance, you can reach us at 1 800-878-7654 (Customer Service Line),
707-525-5788 (California) or email [email protected].


Lower Your
Cost Per Test
Curated for Frugal Managers in Environmental Labs

Lowest Price Available
for Colitag™ Test Kits

Late Order
Cutoff Time
Unit Dose™ Escherichia coli
Item Number UD-8739
315.32 315.32 USD
313.95 313.95 USD
301.00 301.0 USD
Unit Dose™ Salmonella salford
Item Number UD-7833
300.30 300.3 USD
300.30 300.3 USD
300.30 300.3 USD
300.30 300.3 USD
300.30 300.3 USD
Unit Dose™ Enterococcus faecalis
Item Number UD-12697
300.30 300.3 USD
Unit Dose™ Escherichia coli
Item Number UD-9001
300.30 300.3 USD
300.30 300.3 USD
Unit Dose™ Candida albicans
Item Number UD-10231
300.30 300.3 USD
Unit Dose™ Bacillus subtilis
Item Number UD-6633
300.30 300.3 USD
Unit Dose™ Bacillus cereus
Item Number UD-2599
300.30 300.3 USD
300.30 300.3 USD
300.30 300.3 USD
Unit Dose™ Listeria innocua
Item Number UD-11288
300.00 300.0 USD
Universal Wastewater CRM
Item number QCI-084
254.10 254.1 USD
Low-Level Solids CRM
Item number QCI-057
230.00 230.0 USD
Multi-Analyte Solids CRM
Item number QCI-171
207.90 207.9 USD