During the 2010-2011 off-season, the ballpark roof of Chase Field was recoated with an Energy Star certified material which improves the ballpark roof's reflectivity rating and thermal emittance rating, which helps to reduce the heat island effect in downtown Phoenix.
A set of certified Material samples (DORM-2, National Research Council, Institute for National Measurement Standards, Ont; Canada) spiked with grade concentration of metals was analyzed to ensure the accuracy of metals.
Before testing the urine samples, the method was validated; a certified reference material was used (EPA/NIST Reference Material 8444) to evaluate the repeatability and reproducibility.
A certified reference material ("Toxic Metals in Freeze-Dried Human Urine," certified reference material no. 18 from the National Institute for Environmental Studies, Japan Environment Agency) was used for quality control purposes.
The accuracy was confirmed by analysis of a certified reference material, the stream sediment furnished by National Research Centre for Certified Reference Materials (NRCCRM), China (GBW 07310).
The experiments of this factorial were carried out using a certified reference material of tea GBW 07605 furnished by National Research Centre for Certified Reference Materials, China, being the metal recoveries considered as response.
A quality control system was adopted, using analysis of one sample of a certified reference material (NBS Bovine liver 1577 A) and one sample of an internally established reference material from porcine blood for each series of 35 analytical samples.
Values obtained were in accordance with those reported for the certified material with only a few exceptions.
He is a registered Professional Engineer, Certified Energy Manager, and a Certified Hazardous Materials Manager.
The procedure was validated using a certified reference material.
