Automatic Mercury Analyzer AULA-254 Gold LABORATORY The Automatic Mercury Analyzer AULA-254 Gold is designed for fully automatic determination of mercury traces in liquid samples and sample digests. The instrument carries out routine analysis: sample after sample following exactly the preselected procedure thus increasing efficiency and productivity of your lab. MAIN APPLICATIONS SPECIFIC FEATURES  Environmental monitoring: Water, soils, sludge ...  Fully automated flow analysis system  Analysis of foodstuffs: fish, innards, plants ...  Integrated GoldTrap for maximum of sensitivity: <1 ng/l  Medicine: urine, blood, saliva, hair ...  Chemical industry: process monitoring, quality control ...  Geochemistry, mining  Compact modular construction  Wide linear measuring range  Easy to operate with AULAWIN software  Automatic purging after exceedance of mercury concentration  Minimized memory effect  Metallurgy and material testing  Applicable to EPA Methods: 245.1, 245.7, 1631, 7470, 7471A . . . .  Low reagent consumption  Safety for the user RELIABLE AND PROVEN MEASUREMENT METHOD Photometer Thermoelectric dehumidifier Rinse pump Rinse solution Schematic flow diagram: AULA-254 Gold with Automatic Sample Digester ASD The working principle of the system is based on the continuous flow method. First the mercury contained in the sample is transformed into the elemental state by addition of a reducing agent to the sample flow. In a cross-flow reactor the mercury is stripped with a gas stream and carried into the optical cell made entirely of fused silica. There the quantitative determination of mercury is obtained by measuring UV absorption at a wavelength of 253,7 nm at room temperature. This analytical technique is commonly known as cold vapor atomic absorption spectrometry (CVAAS), a method that has proved t

LABORATORY OPTION: Automated Sample Digestion module (ASD) The AULA-254 can be equipped with an optional sample preparation system for aqueous and digested samples. The digestion procedure derives from standard methods commonly used in the laboratory. The sample is automatically drawn from the auto-sampler vial and is continuously mixed with a strong oxidizing reagent (e.g. potassium permanganate, bromide-bromate). Subsequently the sample/oxidant mixture is heated to approx. 98 °C in a heated coil. After the oxidation step hydroxylamine hydrochloride and tin-(II)-chloride are added for reduction...