Check Mark Laboratory

Dairy Wet Chemistry Testing

Check Mark Laboratory is a division of Dairy One and one of the leading dairy chemistry laboratories in the northeast. The laboratory conducts chemistry testing for fat, total protein, true protein, casein, total solids, lactose, titratable acidity, and direct microscopic somatic cell count.  Check Mark can analyze any liquid dairy product for these components. Please reference the sample submission form for further details.  Dairy products that Check Mark is able to analyze include (but are not limited to): heavy cream, whey, retentate, yogurt, milk replacement products, reconstituted powders, or non-bovine milk.

Check Mark is proud to offer a Retest Guarantee. We understand how important correct results are for you to operate your business successfully. Because of that, we welcome feedback about the results that we report to you. We will perform an additional analysis of any type at no cost if the retested result is significantly different from the original result. Please contact the laboratory for details and restrictions.

Please include a completed copy of the Check Mark Sample Submission Form when submitting samples.

Weekly Calibration Samples

The Check Mark laboratory manufactures raw bovine milk calibration standards each week to be used in other labs across the region. We can also develop customized calibration standards specifically for your IR analyzer to monitor your specific dairy product.

Component calibration samples are typically manufactured and shipped each Monday with results available Wednesday. Somatic cell control samples are also manufactured and shipped each Monday with results available Thursday.  

Feel free to view one of our reports posted below for an example of what our calibration sample sets typically look like. Please contact us for details, pricing, or questions. We are happy to accommodate special needs if we are able to.

For a price list or to inquire about Check Mark’s services, contact us at [email protected]

Weekly Calibration Sample Results

Current Results:

7/17/2024 2017 Black

7/9/2024 2016 Green

Previous Results:

7/5/2024 2015 Blue

6/24/2024 2014 Black

6/18/2024 2013 Green

6/11/2024 2012 Blue

6/3/2024 2011 Black

5/29/2024 2010 Green

5/22/2024 2009 Blue

5/14/24 2008 Black

5/8/24 2007 Green

3/20/24 2000 Blue 

3/21/24 2000 Blue SCC

2/21/24 1996 Black

2/22/24 1996 Black SCC

2/7/24 1994 Blue 

2/8/24 1994 Blue SCC

1/24/24 1992 Green

1/25/24 1992 Green SCC

1/17/24 1991 Blue

1/10/24 1990 Black

1/11/24 1990 Black SCC

1/3/24 1989 Green

1/4/24 1989 Green SCC

If previous calibration data sheets are needed, please contact [email protected].