" I'm very impressed with CopperSpec's DC Arc standards. As a producer of SX/EW copper, your standards provide the confidence we need when determining product quality. In particular, let me compliment CopperSpec with generating standards that are very homogeneous and give very consistent intensities from burn to burn. We look forward to using CopperSpec standards for years to come!"---Silver Bell Mine, ASARCO LLC

"...We use CopperSpec instrument calibration High Purity Series to calibrate our instrument for all our cathode analysis. The consistency and accuracy are outstanding and considerably more applicable to our needs than any other pre-made CRM standards I've used in the last 20 years. The flexibility and quality of materials from CopperSpec surpass those of companies I've been seeking CRM's from on three continents."--Kennecott Utah Copper

"...we have purchased a number of copper samples to be used as standards. We have found the material to be highly consistent, well packaged, and the personnel at this firm quite helpful, courteous, and professional. Highly recommended."---Essex Group Inc.

"...The idea of industry wide use of these standards excites me and would save on untold conflicts on the analytical level between producers and consumers. CopperSpec has my enthusiastic endorsement..."--Kennecott Utah Copper