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909 UV Digester

909 UV Digester
8Pages

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Sample preparation for trace analysis of heavy metals

The 909 UV Digester is a modern digestion unit for sample preparation by UV photolysis. Organic molecules in the sample interfere with the determination of heavy metals, particularly in voltammetric or spectroscopic me thods such as ICP and AAS. Based on the proven UV tech nology, the new 909 UV Digester effectively elimi nates organic constituents in liquid samples. UV digestion provides fast and elegant sample preparation, particu larly with slightly contaminated samples. Digestion of samples in the 909 UV Digester is fully auto matic. The centerpiece of the digester is a UV lamp that...

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The key advantages • Controller and wet section in a single housing • Digital input of digestion temperature and digestion time • Microprocessor-controlled regulation of digestion temperature and digestion time • Air cooling, does not need a cooling water supply • Simultaneous digestion of up to 12 samples • Short digestion times • The blank values are practically zero because only very small amounts of reagents are needed • Also suitable for elements that form volatile compounds, e.g. mercury, arsenic, and

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UV digestion Organic constituents in the sample can interfere with the analysis in many ways. For example, a complexing agent can mask the analytes during determination or a com pound can generate an interfering analytical signal. UV digestion is a fast and clean method of decomposing such organic compounds. The actual reagent in the di gestion process is UV radiation. Thus the blank values are practically zero, which is particularly advantageous for trace analysis. UV digestion is based on the principle of photolysis. This can be described in simple terms as breaking down mole cules with...

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Nickel and cobalt in wastewater Determination of nickel and cobalt in the same wastewater after UV digestion. Concentration of each: 1.8 µg/L Voltammogram for a determination of nickel and cobalt in wastewater without UV digestion Cadmium, lead, and copper in red wine 60.0n Voltammogram for a determination of cadmium, lead, and copper in red wine without UV digestion Determination of cadmium (concentration < detection limit), lead (17.7 µg/L), and copper (192.8 µg/L) in the same red wine after UV digestion. Speciation Another application field for the 909 UV Digester is spe ciation...

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Wet section The samples are arranged concentrically around the UV lamp. A fan located in the base dissipates the heat generated by the operating lamp. A red shield protects the user’s eyes against harmful UV radiation. Pt1000 temperature sensor The glass-jacketed temperature sensor is placed into a reference sample. In this way the digestion temperature, controlled by the instrument, is directly measured. Sample holder with quartz sample vessels The sample is digested in a UV-transparent quartz vessel. A PTFE stopper acts as a condensation finger and prevents evaporation of the sample...

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Digestion instrument for UV photolysis of water samples with low to medium organic load. For sample preparation in trace element determination by means of voltammetry, ion chromatography and spectroscopy (AAS, ICP). Instrument for 220...240 V and 50...60 Hz. Scope of delivery also includes 6.1110.010 Pt1000 temperature sensor 6.1446.100 PTFE stopper for UV quartz sample vessel (12 x) 6.2041.240 Sample holder for 12 quartz sample vessels 6.2414.000 Quartz sample vessel 12 mL (12 x) 6.2745.100 UV protective shield 6.2804.090 UV mercury vapor lamp www.metrohm.com Subject to change Layout by...

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909 UV Digester 8Pages

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909 UV Digester
8Pages