i onanalysis 873 biodiesel rancimat standardized determination of the oxidation stability of biodiesel and biodiesel blends as per en 14 112
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the 873 biodiesel rancimat in brief the 873 biodiesel rancimat is a modern pc-controlled instrument for the convenient determination of the oxidation stability of biodiesel and biodiesel blends mixtures of biodiesel and conventional diesel fuel as per en 14 112 the software of the third rancimat generation comprises automatic data acquisition and evaluation as well as a database and permits the easy management of large amounts of data disposable reaction vessels minimize cleaning requirements this saves both time and money the accuracy and reproducibility of the measurements are also significantly improved the glp set with certified temperature sensor allows to set the temperature very accurately and reproducibly which in turn improves the precision of the results 2
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the most important advantages at a glance · all instrument functions controlled from a pc · unparalleled reliability and simple operation due to unique accessories favorably-priced disposable glass parts robust conductivity cell with electrical connections integrated in cover · excellent data security by storing all measuring method and instrument data · re-evaluation and recalculation of all measuring data · database functions such as filtering and sorting · user administration with freely configurable access rights · sophisticated user interface · glp and validation functions · compact design and low weight · two heating blocks with eight measuring positions per instrument up to four instruments can be connected to one pc · independent start of each channel 3
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oxidation stability of biodiesel fatty acid methyl esters fame and biodiesel blends the use of alternative fuels from renewable plant sources has become increasingly widespread in recent years and will continue to increase considerably in the future there are several reasons for this among them the following · fossil fuel deposits are limited which makes economic use of these resources imperative biodiesel is obtained from renewable raw materials · the combustion of biogenic fuels is co2-neutral the carbon dioxide released from them has previously been assimilated from the atmosphere during the growth phase of the plants in contrast to co2 from fossil fuels it makes no contribution to the enrichment of carbon dioxide in the atmosphere and the resulting atmospheric warming · alternative fuels can often be produced locally and this reduces dependence on imported raw materials · alternative fuels are usually very easily biodegradable and therefore cause less environmental damage particu
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during the measurement a stream of air is passed through the fatty acid methyl ester sample contained in a sealed and heated reaction vessel this treatment results in oxidation of the fatty acid methyl ester molecules in the sample with peroxides initially being formed as the primary oxidation products after some time the fatty acid methyl esters disintegrate completely the secondary oxidation products formed include low-molecular organic acids in addition to other volatile organic compounds these are transported in the stream of air to a second vessel containing distilled water the conductivity in this vessel is recorded continuously the organic acids can be detected by the increase in conductivity the time that elapses until these secondary reaction products appear is known as induction time or induction period the oxidation stability of fatty acid methyl esters is already included in various standards as a parameter for defining the minimum quality requirements of commercial biodies
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the 873 biodiesel rancimat in detail two heating blocks the 873 biodiesel rancimat has two independently controlled heating blocks that allow up to eight samples to be tested simultaneously up to four rancimats can be connected to one pc so that the maximum number of samples that can be analyzed in parallel can be increased to 32 each measuring position can be started individually as soon as the measurement has been completed the measuring position is immediately ready for a new sample which means that the instrument can be used to its full capacity 6
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simple reaction vial handling the 873 biodiesel rancimat uses favorably-priced disposable reaction vessels weighing out the sample and assembling the reaction vessel are extremely simple and safe as the vessel does not need to be thoroughly cleaned at the end of the measurement the personnel are available for other tasks this reduces analysis costs special reaction vessels for biodiesel blends for more volatile samples e.g mixtures of biodiesel and conventional diesel fuels biodiesel blends specially extended reaction vessels are available on request the part projecting from the measuring block acts as a condenser and reduces distillation losses measuring vessels robust glass beakers are used for automatic conductivity measurement cover with built-in conductivity cell the conductivity cell is incorporated in the measuring vessel cover when the cover is placed in position the cell is immersed in the water at the same time electrical contact is made to the electronics in the instrument
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software functions all functions of the 873 biodiesel rancimat are controlled by the rancimat software which excels by its user-friendliness all the functions are clearly arranged in just a few windows the operation is intuitive rancimat control this is where the measuring parameters can be called up and edited from here the instrument functions are controlled directly the measurements started and the actual measuring values shown in the live display field the arrangement of this window corresponds to a view of the instrument from above this means that the assignment of sample information and measuring position is perfectly clear the timer function can be used to automatically switch on the heating blocks in advance so that it is no longer necessary to wait while they warm up the functions in a nutshell · individual start/stop for each position · live display · temperature display · method definition · instrument control · calculation formulas automatic result transformation to other t
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glp functions by using the built-in monitoring of the validation intervals nothing can go wrong with your quality management procedure the software prompts you to carry out the validation in good time the wizards for temperature and conductivity validation help you to do this · monitoring the validation intervals · wizards for temperature and conductivity · electronic validation logbook user administration the software includes flexible and comfortable user administration with login function this can be used to define detailed access rights for groups of users and individuals · definition of user access rights · login function 9
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technical specifications heating blocks 2 aluminum heating blocks electrically heated can be set to different temperatures number of samples 8 samples 4 measuring positions per heating block temperature control and measurement temperature range 50 220 °c adjustable in 1 °c steps temperature correction -9.9 9.9 °c adjustable in 0.1 °c steps reproducibility of set temperature typically better than ±0.2 °c temperature variation typically <0.1 °c temperature difference between different measuring positions typically <0.3 °c instrument heating-up time from 20 °c to 110 °c approx 45 min to ±0.1 °c temperature stability outer temperature of instrument <50 °c at an operating temperature of 220 °c response temperature of thermal protection device 260 °c after the operating temperature has been reached with reaction vessels inserted and all filled in the same manner 20 l/h air throughput air throughput pump output range conductivity measurement measuring range electrodes diaphragm pump 7 25 l/h
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ordering information 873 biodiesel rancimat rancimat for the automatic determination of the oxidation stability of biodiesel and biodiesel blends as per en 14 112 with conductometric indication including biodiesel rancimat software 2.873.0014 873 biodiesel rancimat 230 v 50 60 hz 2.873.0015 873 biodiesel rancimat 115 v 50 60 hz options 6.2059.000 6.2757.000 6.1839.000 6.5616.000 6.2301.060 6.1429.050 6.2418.130 turntable for 873 biodiesel rancimat exhaust collection tube for 873 biodiesel rancimat with 8 stoppers iso-versinic® tubing for biodiesel measurements 6 mm i.d 9 mm o.d length 22 cm 8 pieces are required glp test set 6.1111.010 pt-100 temperature sensor 16 cm 6.1253.000 measuring insert for heating block 6.2109.030 test plug 10 kohm kcl conductivity standard ckcl 0.1 mol/l 250 ml reaction vessel long length 250 mm for measurements involving volatile oils mineral oils and biodiesel blends air inlet tube long length 248 mm for measurements involving volatile oils mineral oils
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i onanalysis metrohm ltd ch-9101 herisau/switzerland phone +41 71 353 85 85 fax +41 71 353 89 01 www.metrohm.com info@metrohm.com subject to modifications layout by ecknauer+schoch asw printed in switzerland by metrohm ltd herisau 8.873.6003 2007-02
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