Spectrum's Calibration and Q.C. Standards have been formulated to meet the requirements of both ASTM and EPA Methods. All raw materials are checked for chemical purity and the prepared standards analyzed for composition. The results are then compared against the gravimetric figures and are NIST traceable by weight. The Standards are designed specifically for the Analytical Chemist to efficiently and economically analyze for the required properties.
The advantages of using Spectrum's Standards are: