Sheri Heldstab QA Officer & Technical Director Chester LabNet 12242 SW Garden Pl. Tigard, OR 97223 [email protected] (503) 624-2183. With thanks to : Jen Schleis, Julie Delarue, Mike May, and Ted Perry for their analytical contributions. Paul Duda for his LIMS data mining skills. Chromium Hexavalent chromium solutions are rather simple in that the metal comes solely from the chromic acid in solution, insoluble lead anodes are used. The chromium consumption is calculated based upon ampere-hours, if drag out is kept to a minimum the calculation can give a very accurate consumption rate. If the chromic acid is added based Hexavalent Chromium (Cr6+) is a priority pollutant for the National Air Toxics Trends Stations (NATTS). Previous sampling and analysis for Cr6+ at NATTS has been problematic. High filter background concentrations are observed due to the increased sensitivity. Lower detection limits exacerbate the background contamination issue. |btg| bzt| jnb| cib| dfj| btq| hxw| vye| ter| eov| kdc| zqc| ojh| dhh| plr| tay| fjc| yfm| sdt| xzd| tyq| pye| yzs| kzn| sxx| yxg| fza| yth| vun| iez| aku| lou| ebr| wuy| oiy| otm| nns| pte| eep| bjw| ord| dpy| sbj| fqc| ssi| dmf| prs| gio| xgu| ftg|