Analytical methods for the determintion of some elements and Fe/sup +2/ to Fe/sup +3/ ratio in simulated sludges and Synroc formulations
Analytical methods for the determination of Fe, Al, Mn, Ca Ni, Na, Sr, Cs, Ti, and Ba in simulated sludges and Synroc fo 'lulations are discussed. These sre Vie elements that may be complet d by atomic absorption spectroscopy, AAS. AAS methods are complic ed by the dissolution methods used. These problems are discussed. In addition, *2 +3 the method used for the determination of Fe to Fe ratio is presented. Manganese: AAS Wavelength: 2795 A Light Source: Hollow cathode lamp Flame Type: Air
... lame Type: Air -acetylene flame, oxidizing (lean, blue). Sensitivity: 0.06 g Mn/ml for 1% absorption Linear Working Range: The working range for Mn is linear up to concentrations of approximately 3 «g Mn/ml in aqueous solution. Comments: The analysis of Mn by AAS appears to be interference free. Calcium: AAS Wavelength: 4227 A Light Source: Hollow cathode lamp Flame Type: Nitrous oxide -acetylene flame reducing (rich, red). Sensitivity: 0.05 ug Ca/ml for \% absorption Linear Working Range: The working range for Ca is linear up to concentrations of approximately 6 ug Ca/ml in aqueous solution. Comments: The sample solution used for determining Ca should not contain any F~. Calcium fluoride is only slightly soluble, and low results will be obtained in the presence of fluoride. Best results may be obtained by adding 0.5% La to sample and standards to control interferences and ionization of the calcium in the nitrous oxideacetylene flame. Acid concentration of the standards should be matched with that of the samples. Nickel: AAS Wavelength: 2320 A" Light Source: Hollow cathode lamp Flame Type: Air-acetylene flame oxidizing (lean, blue) Sensi/ity: 0.2 yg Ni/ml for 1% absorption Linear Working Range: The working range for Ni is linear up to concentrations of approximately 5 w g Ni/ml in aqueous solution.