trace analysis in a wide variety of samples application bulletins of metrohm s approximately 200 application bulletins 50 refer to polarography and voltammetry the examples listed here substantiate the versatility of the polarographic and voltammetric methods for a range of applications including both inorganic and organic substances application bulletin no application bulletin no water wastewater environmental protection aluminum in water samples 131 ammonium and nitrite in water samples 127 copper cobalt nickel zinc and iron in foods and water samples 114 iron and manganese in water samples 123 molybdenum in water samples plants and salts 120 nta and edta in water samples 76 platinum in environmentally relevant matrices 220 thallium antimony bismuth iron copper and vanadium in water samples 74 zinc cadmium lead copper thallium nickel and cobalt in water samples according to din 38 406 part 16 231 food and beverages copper cobalt nickel iron and tin in beer 62 cyst
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highly versatile tools compact brain the 746 va trace analyzer applies multitasking it is available with or without a built-in printer its compact housing encloses all elements that are important for analytical practice · the piezoelectric keypad ensures clear-cut operation and fast access to the instrument functions · the backlit lcd screen shows methods and routines calibration curves voltammograms and results in short it provides you with up-to-date information before during and after the determination with the 746 va trace analyzer you can read and load memory cards thus increasing the storage capacity for your measured values and methods and rendering them transferable two 747 va stands and four 685 dosimats or four 700 dosinos can be attached to the 746 va trace analyzer the 695 va autosampler allows highly sophisticated automation of your analyses a balance and a computer can be connected via the two bidirectional rs 232c interfaces the instrument version without built-in prin
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highly versatile tools programs for your pc should you wish to attach your pc to the 746 va trace analyzer two metrodata pc programs are at your disposal both programs run under windowstm and are thus easy to operate · metrodata «va backup» allows storage in the pc and on diskette of methods and determinations that have been developed with the 746 va trace analyzer preparation has been made for the export of data to a spreadsheet program metrodata «va backup» is delivered together with the 746 va trace analyzer · metrodata «va database» accepts methods determinations and sample data from the 746 va trace analyzer for storage in the pc windowstm 95 98 nt me 2000 xp where the data are stored in a sophisticated data base that offers multiple possibilities in terms of filtering selecting and querying the tailor-made explorer gives a quick overview you can use it to look for substance-related data graphs and reports plus compare them the drag drop report generator is a highly useful tool
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va stand with time-tested concept 747 va stand new features in a proven construction the 747 va stand which combines the new and the time-tested offers the following benefits · it is simple to operate and extremely robust · the multi-mode electrode mme is an outstanding working electrode which has more than proved its worth in practice it combines the dme dropping mercury electrode hmde hanging mercury drop electrode and the smde static mercury drop electrode the mme generates highly reproducible mercury drops supplies a signal with minimum interference and consumes very little mercury in the mme the mercury is completely sealed in and is simple to handle it comes into contact only with inert material and is thus protected against contamination economical capillaries help keep the running costs low · a rotating disk electrode rde with tips made of glassy carbon «ultra trace» graphite platinum or gold is available as an option its installation is straightforward there is a special pre
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modular automation partial automation not an incomplete solution analyses performed with the va trace analyzer can be automated in steps instead of executing standard additions manually you can have these done by one or several 700 dosinos or 685 dosimats whereby the standard addition volume can be programmed as a function of the peak height in a further step rinsing and the addition of auxiliary reagents can also be undertaken by dosinos these measures save you from a lot of routine work between the start and the end you do not need to look at the individual determinations the optional pipetting equipment facilitates the manual pipetting and diluting steps high-performance autosampler the 695 va autosampler helps manage series of samples in the trace analysis laboratory it is controlled entirely via the 746 va trace analyzer its sample rack can accommodate up to 80 samples plus various auxiliary standard and rinsing solutions it also performs sample preparation steps such as dilutio
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two of the many applications determination of zn cd pb and cu in a wastewater sample sample industrial wastewater reagents all reagents used were of the highest purity the ultrapure water was prepared using a water purification unit milli-q millipore method zn cd pb cu anodic stripping with dp differential pulse addition of a standard solution containing zn cd pb and cu sample preparation digestion by uv photolysis to 10 ml acidified sample 20 µl h2o2 30 perhydrol were added and the solution treated for 1 h at 90 °c in the 705 uv digester 10 ml digested sample were transferred to the measuring cell and 1 ml acetate buffer added [ckcl 1.5 mol/l cnaac 0.5 mol/l see application bulletin no 231 before the start of the voltammetric analysis the sample was deaerated in the measurement cell for 5 min with nitrogen short result report units and calculation formulae can be freely chosen voltammogram of the sample digested in the 705 uv digester showing from top to bottom the peaks for cd p
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technical specifications details of 746 va trace analyzer brief description · compact control and data acquisition instrument for up to two 747 va stands and up to four 685 dosimats or four 700 dosinos screen keypad as well as 2 bidirectional rs 232c interfaces and 8 control lines are integrated optional built-in printer · the 695 va autosampler a highly sophisticated automation tool is also controlled by the 746 va trace analyzer keypad · piezoelectric keypad splashwater-proof with function keys softkeys keys for instrument dialog cursor control and numeric block measurement techniques · · · · · · · · direct current differential pulse square wave 10 250 hz phase-sensitive alternating current 1st harmonic 10 250 hz ac2 phase-sensitive alternating current 2nd harmonic 10 250 hz cv cyclic voltammetry digital ramp 1 mv/s 100 v/s psa potentiometric stripping analysis automatic amplifier control and current compensation dc dp sqw ac1 special glp features · quantitative assessmen
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technical specifications details of 747 va stand brief description · stand for 746 va trace analyzer includes potentiostat and measuring amplifier that is exceptionally broad banded and low noise with multi-mode electrode mme rotating disk electrode rde as an option electrodes · 6.1246.020 multi-mode electrode mme pneumatically operated incorporates dme hmde and smde working electrode we types · 6.0728.020 ag/agcl reference electrode re · 6.0343.000 auxiliary electrode ae made of pt with plastic shaft optional auxiliary electrode made of glassy carbon · rde with interchangeable disk electrodes option stirrer · speed 1000 to 3000 min1 · material ptfe measuring vessels · working volume 10 70 ml option above 5 ml · measuring vessel with thermostat jacket as option thermostating through third-party apparatus automatic addition of standard and auxiliary solutions · max four 685 dosimats or four 700 dosinos automatic sample addition · with 695 va autosampler potentiostat · voltage r
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ordering information options ordering information 746 va trace analyzer 2.746.0010 2.746.0020 compact control unit for polarographic and voltammetric analyses with the 747 va stand screen and keypad are built in without printer but with parallel interface for external printer same as 2.746.0010 but with built-in thermal printer a4 format without parallel printer interface 747 va stand for manual and automatic sample introduction 2.747.0010 stand for 746 va trace analyzer with or without 695 va autosampler with multi-mode electrode mme without rotating disk electrode rde swing-back measurement arm integrated drip pan with extensive accessories options 695 va autosampler 2.695.0010 x y z sample changer for 746 va trace analyzer and 2.747.0010 va stand accommodates up to 80 samples plus standard auxiliary and rinsing solutions two 700 dosinos with 50 ml dosing units have to be ordered separately during automatic analyses with the 746 va trace analyzer 695 va autosampler and 2.747.0010
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ordering information options 6.3026.150 5 ml exchange unit for 685 dosimat with flat ptfe/pctfe stopcock 1 l reagent bottle made of brown glass the above exchange unit allows direct reagent dispensing from bottles with gl45 glass threads i.e from 1 l reagent bottles of baker and riedel-de haėn for other types of bottles the following adapters are available 6.1602.110 6.1618.000 6.1618.010 6.1618.050 siphon for 6.3014.xxx exchange units for merck reagent bottles with s40 thread adapter 32 mm/gl45 for fluka reagent bottles and 500 ml reagent bottles from riedel-de haėn adapter 28 mm/gl45 for fisher reagent bottles adapter 40 mm/gl45 for plastic bottles 6.1608.060 100 ml pe and plastic canisters 6.1621.000 10 l pe with 40 mm thread automatic addition of standard and auxiliary solutions with a 700 dosino 700 dosino dispenser for 746 va trace analyzer and 747 va stand with fixed connection cable l 1,5 m 5 ml dosing unit for 700 dosino the above dosing unit allows direct reagent dispensing
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ordering information options 6.1457.210 measuring vessel for 695 va autosampler with thermostat jacket working volume 12 70 ml additional measuring vessels 6.1418.220 6.1450.210 6.1415.150 measuring vessel with thermostat jacket working volume 12 70 ml measuring vessel made of pfa perfluoralkoxy copolymer working volume 10 90 ml measuring vessel working volume 5 70 ml 705 uv digester digestion apparatus for the uv photolysis of water samples containing moderate amounts of organic matter comprises a control unit and a separate wet part with uv lamp cooling device and holder for 12 sample vessels including accessories 2.705.0017 2.705.0016 u 220 240 v 50 hz u 220 240 v 60 hz 8.746.6003 subject to modifications printed by metrohm ltd herisau switzerland 2002-07 16 va trace analyzer
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