Hardness - Blind

A 250 mL ready-to-use sample packaged in a HDPE bottle to be analyzed for:  Calcium 10 - 100 mg/L, Magnesium 4.0 - 40 mg/L, Total Hardness 40 - 415 mg/L, Calcium Hardness 25 - 250 mg/L. Exact values are documented on lot COA. PT Express may take up to 10 business days to ship.

The proficiency testing studies help improve quality and comply with regulations. Order the NSI PT Express™, our on-demand proficiency testing, when you have an immediate need for proficiency test results. These environmental chemistry wastewater proficiency tests are designed for identification of target chemicals in wastewater. Environmental Chemistry Wastewater PT Express samples may take 7 to 10 business days to ship. If you need the samples sooner, please call NSI at 1-800-234-7837 to expedite your order.

On-demand proficiency test (PT) for when you need results fast