TOXICOLOGICAL PROFILE FOR CHROMIUM - Davidborowski.com

Sample matrixAir (totalchromium)Air (totalchromium)Air (totalchromium)Air (totalchromium)Air (totalchromium)Air(chromium(VI))Air(chromium(VI))Table 6-2. Analytical Methods for Determining Chromium in Environmental SamplesPreparation methodAir particulate mattercollected on filter is cut outand irradiated with X-rayphotonsThe collected particulates infilter dissolved in HNO 3 , driedand redissolved in acidifiedwaterParticulate matter collectedon cellulose ester filter,digested with aqua regiaAir particulate collected oncellulose ester filter, wetwash with HCI/HNO 3Sample collected oncellulose ester membranefilter dissolved in acidmixturesSample collected on sodiumcarbonate-impregnatedcellulose filter leached withsodium bicarbonateSample collected in filterscontaining sodiumbicarbonate buffer at 15L/minuteAnalyticalmethodSample detectionlimit Percent recovery ReferenceXRF 0.017 µg/m 3 No data Wiersema et al. 1984ICP-AES 0.05–0.2 ng/m 3 No data Barrie and Hoff 1985ICP-AES 1 µg/m 3 87–102% at0.5–100 µgFlame atomicabsorptionLo and Arai 19880.06 µg/sample 98% at 45–90 µg/sample NIOSH 1994c(Method 7024)ICP-AES 1 µg/sample 98% at 2.5 µg/filter NIOSH 1994d(Method 7300)Ion chromatography/coulometricIon chromatography/coulometric0.1 ng/m 3 for20 m 3 sample0.01 ng/m 3 for20 m 3 sample89–99% at 100 ng CARB 199094% Sheehan et al. 1992CHROMIUM 3206. ANALYTICAL METHODS