Catalog excerpts
Sample preparation for trace analysis of heavy metals
Open the catalog to page 1The 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...
Open the catalog to page 2The 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 selenium
Open the catalog to page 3UV 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...
Open the catalog to page 4Nickel 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...
Open the catalog to page 5Wet 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...
Open the catalog to page 6Technical data Digestion Digestion temperature Control accuracy Lamp power (controlled) Cooling Ambient temperature (operating range) Digestion time UV lamp Type UV-A (315...400 nm) UV-B (280...315 nm) UV-C (200...280 nm) Discharge tube temperature Length Outer diameter Useful life Medium-pressure mercury lamp 35 W 40 W 70 W 700...900 °C 137...139 mm approx. 16 mm 500...1’000 h Temperature measurement Sensor Pt1000 Measuring input Accuracy ± 0.2 °C (under reference conditions) Measuring range -20...+150 °C Power supply Voltage Frequency Power consumption Dimensions Width Height Height (with...
Open the catalog to page 7909 UV Digester (230 V) 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 Pt1000 temperature sensor PTFE stopper for UV quartz sample vessel (12 ×) Sample holder for 12 quartz sample vessels Quartz sample vessel 12 mL (12 ×) UV protective shield UV mercury vapor lamp Subject to change Layout by Ecknauer+Schoch ASW, printed in Switzerland by Metrohm AG,...
Open the catalog to page 8All Metrohm catalogs and technical brochures
-
OMNIS KARL FISCHER TITRATOR
4 Pages
-
2029
1 Pages
-
2026 Titrolyzer
8 Pages
-
Mira P Handheld
8 Pages
-
µStat-i 400
2 Pages
-
OMNIS Sample Robot
4 Pages
-
930 Compact IC Flex
12 Pages
-
899 Coulometer
8 Pages
-
Accessories for 2.1008.1010
6 Pages
-
OMNIS
16 Pages
-
Sample preparation
12 Pages
-
Titrotherm
12 Pages
-
855 Robotic Titrosampler
12 Pages
-
888/890 Titrando
12 Pages
-
904/905 and 906/907 Titrando
24 Pages
-
OMNIS
8 Pages
-
PSTAT mini
8 Pages
-
Professional Rancimat
20 Pages
-
Dosing Package
4 Pages
-
Dosing Interface
3 Pages
-
Dosimat plus
4 Pages
-
Amino acid analyzer
4 Pages
-
Industrial Process Analyzers
16 Pages
-
Vision Air Software
12 Pages
-
815 Robotic Soliprep
16 Pages
-
KF Evaporator
4 Pages
-
848/877 Titrino plus
8 Pages
-
NIRS XDS MasterLab Analyzer
4 Pages
-
NIRS XDS MultiVial Analyzer
4 Pages
-
NIRS XDS SmartProbe Analyzer
4 Pages
-
921 NIRS Vial Heater
1 Pages
-
NIRS DS2500 Analyzer
4 Pages
-
NIRS Analyzer Pro
8 Pages
-
898 XYZ Sample Changer
8 Pages