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By continuing to use the website, you agree to the use of cookies. Discover OMNIS here! In addition, coulometry is an absolute method and thus no titer determination is necessary. Coulometric titrations are carried out easily and quickly with the 851 Titrando.For KF instruments, VA measurement stands, VA Computrace and IC Dilution. For Rancimats and Karl Fischer instruments.High-performance report generator In compliance with the directives according to FDA 21 CFR Part 11 Parallel titration Dialog languages: German, English, French, Italian, Spanish, Portuguese, Polish, Russian, Slovakian, Czech, Japanese, Chinese and Traditional Chinese This webinar covers topics such as drift value, handling of electrodes, avoiding over titration, and more. All rights reserved. Although all the information given in this documentation has been checked with great care, errors cannot be entirely excluded. Should you notice any mistakes please send us your comments using the address given above. Page 9 ?????????????????????? 1 Introduction 1 Introduction 1.1 The Titrando system The Titrando is the heart of the modular Titrando system. A Titrando system can contain numerous kinds of a variety of instruments. The following figure provides an overview of the peripheral devices you can connect to the 851 Titrando. Various monographs on the subjects of titration techniques and electrodes are also available. Page 11 ?????????????????????? 1 Introduction ? ? ? 1.4 BRC Coulometric bromine index determination. Determining the amount of double bonds in mineral oils, for example. Page 12 ?????????????????????? 1.5 Safety instructions WARNING This symbol draws attention to a possible hazard due to electrical current. WARNING This symbol draws attention to a possible hazard due to heat or hot instrument parts. WARNING This symbol draws attention to a possible biological hazard. CAUTION This symbol draws attention to possible damage to instruments or instrument parts.
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NOTE This symbol highlights additional information and tips. 1.5 Safety instructions 1.5. Page 13 ?????????????????????? 1 Introduction WARNING Never open the housing of the instrument. The instrument could be damaged by this. There is also a risk of serious injury if live components are touched. There are no parts inside the housing which can be serviced or replaced by the user. Mains voltage WARNING An incorrect mains voltage can damage the instrument. Only operate this instrument with a mains voltage specified for it (see rear panel of the instrument). Clean up spilled liquids and solids immediately. Follow the safety instructions of the chemical manufacturer. Mini DIN, 9-pin. 4 MSB connector (MSB 1 to MSB 4) Metrohm Serial Bus. Page 17 ?????????????????????? 3 Installation 3 Installation 3.1 Setting up the instrument 3.1.1 Packaging The instrument is supplied in highly protective special packaging together with the separately packed accessories. If you wish to pull out the plug, you will first need to pull back the outer plug sleeve marked with arrows. Connect the Touch Control as follows: 1. Insert the plug of the Touch Control connection cable into the Controller socket. Page 19 ?????????????????????? 3 Installation CAUTION The Touch Control must be shut down properly by deactivation with the power switch on the rear of the instrument before the power supply is interrupted. If this is not done, then there is a danger of data loss. Because of the fact that the power supply for the Touch Control is provided through the Titrando, you must never disconnect the Titrando from the power supply (e.g. by deactivating with a connector strip) before you have deactivated the Touch Control. Page 20 ?????????????????????? 3.2 Connecting a controller 6.2151.000 Figure 5 Connecting the computer The instrument is recognized. Depending on the version of the Windows operating system used, the driver installation proceeds differently afterwards.
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Either the necessary driver software is installed automatically or an installation wizard is started. 3 Follow the instructions of the installation wizard. Page 21 ?????????????????????? 3 Installation 1 Setting up the instrument ? ? Start the PC software. The instrument is automatically recognized. The configuration dialog for the instrument is displayed. Make configuration settings for the instrument and its connectors. Type 700 Dosino and 685 Dosimat dosing devices cannot be connected together with other MSB instruments on a shared connector. These dosing devices must be connected separately. CAUTION Exit the control software before you plug in MSB instruments. Page 25 ?????????????????????? 3 Installation ? ? Connect the Remote Box connection cable to one of the sockets marked with MSB on the rear of the control device. Start the control software. If you operate the 851 Titrando with the help of the Touch Control, then you should use a USB hub with its own power supply. This is usually 9-pin and marked with the symbol IOIOI. The keyboard is recognized automatically and entered in the device manager. 3 Configure the keyboard in the device manager of the Touch Control (see Touch Control manual). 3.4.6 Connecting a barcode reader The barcode reader is used as an aid for text and numerical input. You can connect a barcode reader with USB interface. Page 30 ?????????????????????? 3.4 Connecting USB devices 4 Program the barcode reader in such a way that the ASCII character 02 (STX or Ctrl B) is sent as the first character. Do not pack the cotton too tightly. 2 Fill the molecular sieve up to.Page 36 ?????????????????????? 3.5 Titration vessel for coulometric KF titration 6.2104.020 3 6.2104.120 4 Figure 17 Screwing the electrode cable to the electrodes NOTE Mark the screw head of the electrode cable. This prevents you from mixing up the indicator and generator electrode. For aspiration, the 6.5617.
000 aspiration equipment is used, including a complete dosing unit and a 50 mL glass cylinder. Page 39 ?????????????????????? 3 Installation 4 4 Place the stopper with the attached aspiration tip into the groundjoint opening with the ground-joint sleeve. Insert the aspiration tip into the coulometer cell until it touches the vessel base. 3.5.5 Coulometer cell with Karl Fischer oven When samples release their water only slowly or only at higher temperatures, the oven method is used.This is the only way that shielding against electrical interference can be ensured. Page 43 ?????????????????????? 4 Coulometric titration 4 Coulometric titration 4.1 Principle of coulometry according to Karl Fischer The coulometric Karl Fischer titration is a variation of the classic water content determination method according to Karl Fischer. The conventional method works with a methanolic solution of iodine, sulfur dioxide and a base as buffer substance. The inside of the syringe is being rinsed by water standard and freed from water contamination. 7 Dispose of the used water standard in a waste bottle. 8 Draw the rest of the water standard into the syringe, aspirating as little air as possible. 9 Push out any air bubbles that may be present in the syringe. Page 46 ?????????????????????? 4.3 Sample addition 15 The next determination can be started as soon as the determination has been finished and the coulometer cell has been conditioned (drift stable) again. 4.3 Sample addition This chapter contains a few notes concerning sample addition. An exhaustive discussion of this topic is not possible here. Further notes can be found in the publications from the reagent manufacturers and in the following Metrohm Application Bulletins: Bulletin No. Title No. Page 47 ?????????????????????? 4 Coulometric titration The best way for you to determine the injected sample amount is to reweigh the sample. Glass syringes should be used for the determination of traces and validations.
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We recommend obtaining these from a specialized syringe manufacturer. Highly volatile samples and samples of low viscosity should be cooled before sampling. Doing so avoids losses while working. The syringe must, however, not be cooled directly, as condensation could form. The KF reagent has reached its capacity limit. The drift is too high, and cannot be reduced by shaking the coulometer cell. A two-phase-mixture is being formed in the coulometer cell; in this case it is also possible to aspirate the sample phase only. Exhausted electrolyte solution is best disposed of by aspiration. Page 50 ?????????????????????? 5.1 General notes 5 Operation and maintenance 5.1 General notes 5.1.1 Care The 851 Titrando requires appropriate care. Excess contamination of the instrument may result in functional disruptions and a reduction in the lifetime of the otherwise sturdy mechanics and electronics. Spilled chemicals and solvents should be removed immediately. Above all, the plug connections on the rear of the instrument (in particular the power socket) should be protected from contamination. Page 51 ?????????????????????? 5 Operation and maintenance 5.2 Generator electrode 5.2.1 Generator electrode without diaphragm The 6.0345.100 generator electrode without diaphragm is easy to handle and clean. It needs only one reagent and is quickly ready for use (no moisture deposits in the diaphragm!). The generator electrode without diaphragm is suitable for most applications. If cleaning is necessary anyway, ensure that the Pt grid of the generator electrode is not damaged. ? ? ? ? Resinous residues on the diaphragm Hang the generator electrode vertically on a support rod, fill with concentrated HNO3 and leave overnight. First rinse with water, then with ethanol. Page 53 ?????????????????????? 5 Operation and maintenance Metrohm representative regarding the precise terms and conditions involved in concluding a corresponding maintenance agreement.
The Touch Control or the computer has not been switched on yet or the plugs are not correctly plugged in. 1. Check the plug connections. 2. Switch on the Touch Control or the computer. 6.2 Karl Fischer titration Problem Cause Remedy The drift is very high during conditioning. The titration cell is leaking. Page 55 ?????????????????????? Problem 6 Troubleshooting Cause Remedy. Select a short delay time. See also: The drift becomes greater after each titration. The sample is overtitrated. The increments at the end of the titration are too high. ? ? The solution becomes darker after each titration. For connecting external dosing devices or stirrers. Page 58 ?????????????????????? 7.1 Remote interface Assignment Pin No. Table 4 Explanation of the individual functions Function Explanation Start The current method is started at the time of activation. Page 59 ?????????????????????? 851 Titrando 7 Appendix Function Explanation Warning The line is set for warning message display. Page 60 ?????????????????????? 8.1 Measuring interface 8 Technical specifications 8.1 Measuring interface The 851 Titrando has one galvanically isolated measuring interface. The measuring cycle is 100 ms for all measuring modes. 8.1.1 Generator electrode One measuring input (Gen.) for a generator electrode. 400 mA Continuous current and pulsed Imax 8.1.2 Indicator electrode One measuring input (Ind.) for an indicator electrode. The general warranty period is 36 months (exclusions below) from the date of delivery or 18 months in the event of continuous operation. The warranty remains valid on the condition that the servicing is provided by a service organization authorized by Metrohm at defined intervals and with a defined scope. Page 64 ?????????????????????? Deficiencies arising from circumstances that are not the responsibility of Metrohm, such as improper storage or improper use, etc., are expressly excluded from the warranty.
Metrohm also offers a 120 month spare parts availability guarantee and a 60 month PC software support warranty, calculated from the date on which the product is withdrawn from the market. Page 67 ?????????????????????? Qty. 1 10 Accessories Order no. Length (m): 1 1 6.2701.040 Screw cap PBT. With orifice for 6.1448.020 Septum. Used with 6.5405.000 Cell without diaphragm and 6.1464.32X and 6.1465.320 Titration vessels. Description 6.2730.030 Stopper Complete with nipple and E.301.0043 O-ring. For 6.1414.030 titration vessel lid. For KF instruments, VA measurement stands, VA Computrace and IC Dilution. Length (mm): 38 1 6.2738.000 Funnel For the KF coulometer. Material: Outer diameter (mm): Inner diameter (mm): 1 6.2811.000 PP 50 6 Molecular sieve Molecular sieve. Bottle containing 250 g. Pore size: 0.3 nm. Without moisture indicator. Page 72 ?????????????????????? 10.1 Scope of delivery Qty. 2 Order no. Description 6.2816.030 Needle with Luer connector Needle for filling in mercury into the Multi-Mode Electrode and for sample addition in Karl Fischer titration. Outer diameter (mm): 0.8 Length (mm): 80 2 6.2816.090 Syringe 5 mL 5 mL syringe made of PP, with Luer connector. Material: PP 1 6.2122.0x0 Power supply cable with IEC 60320 line socket, type C13 Cable plug according to customer requirements. Moreover, coulometry is an absolute method and thus no titer determination is necessary. Page 74 ?????????????????????? 10.1 Scope of delivery Qty. Order no. Description Shaft diameter bottom (mm): Min.Description 6.1448.020 Septum 16 mm, 5 pieces Set of 5 pcs. Page 77 ?????????????????????? Qty. 1 10 Accessories Order no. Used with 684, 737, 756 KF Coulometers Material: PBTP Height (mm): 20 Outer diameter (mm): 24 Inner diameter (mm): 18 3 6.2713.000 Sleeve For the fat-free ground-joint connection with the standard groundjoint SGJ 14. Material: PTFE foil 1 6.2713. Page 79 ?????????????????????? Qty. 1 10 Accessories Order no. Page 80 ?????????????????????? 10.
1 Scope of delivery Qty. 2 Order no. Description 6.2816.030 Needle with Luer connector Needle for filling in mercury into the Multi-Mode Electrode and for sample addition in Karl Fischer titration. Page 83 ?????????????????????? Qty. 1 10 Accessories Order no. Page 87 ?????????????????????? Qty. 2 10 Accessories Order no. Description 6.2816.030 Needle with Luer connector Needle for filling in mercury into the Multi-Mode Electrode and for sample addition in Karl Fischer titration. Material: PTFE foil 1 6.2713. Page 93 ?????????????????????? Qty. 1 10 Accessories Order no. Page 94 ?????????????????????? 10.1 Scope of delivery Qty. 2 Order no. Description 6.2816.030 Needle with Luer connector Needle for filling in mercury into the Multi-Mode Electrode and for sample addition in Karl Fischer titration. Using tightly sealed sample vials, the sample is inserted in the oven. The samples can be subsequently analysed by any volumetric or coulometric KF titrator. FEP tubing connection, anti-diffusion buret tip. Description 2.874.0020 874 USB Oven Sample Processor customized ?????????????????????? The 874 Oven Sample Processor is used for thermal sample preparation in Karl Fischer titration. The oven method is suitable for samples that only release their moisture at higher temperature, for sparingly soluble samples or samples that undergo side-reactions with the KF reagent. Get Started Login here In addition, coulometry is an absolute method and thus no titer determination is necessary. The 852 Titrando controls not only coulometric, but also volumetric Karl Fischer titration. Be the first to review! Change File Login here. Predefined methods for water content determination in liquefied and permanent gases make it easier to work with the 875 KF Gas Analyzer. In addition to determining water content in gases, the system can also be used for determining water content in liquid and solid samples. A monitor with keyboard and mouse is also required to control the system.
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View All Applications Resources Resources, Guides and Articles Learn about equipment technologies and science in our resource center. Popular Auction Companies Home Laboratory General Lab Equipment Ovens Metrohm 885 Compact Oven 851 Titrando 900 Touch Control 803 Ti Stand Remote Box This Ad Listing has been archived or disabled. Please see more itemsfrom Sci Tech Traders, LLC or browsethrough our Ovens category to find more products for sale on Labx. All instrument components were tested using manual control and a Method was successfully executed. The sample rack, autosampler tower, heater and gas pump all function properly and visually the instrument looks great. It is ready to use with all plumbing and accessories in place. All MSB ports were tested, instrument executes a coulometric titration method utilizing all attached accessories. 803 Aspiration and dosing functions work properly. Complete turnkey system with all tubing and accessories in place. Designated trademarks and brands are the property of their respective owners. Use of this Web site constitutes acceptance of the LabX User Agreement. With its operating interface designed for routine users, the 870 KF Titrino plus is so easy to operate that it only requires a short familiarization period. Also its robustness makes it the ideal titrator for routine determinations The live curve allows you to recognize sidereactions Metrohm KF titrators are equipped with a display showing the live curve as standard. This allows you to recognize side-reactions in good time and take measures to suppress them. Intelligent Exchange Unit for more comfort The chip of the intelligent Metrohm Exchange Unit automatically provides the titrator with all the. The picture shows the 851 Titrando. In the picture with 851 Titrando. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.
Quick Links Request Product Information Contact Supplier Building a temperature method is very simple and the available brochures and manuals for guidance are properly described for the user. The equipment has a small footprint on the lab desk, which is admirable to accommodate in small space. I didn't like the display screen on the equipment. It is very dark and has no backlight for illumination. That should be improved. A proper keypad is also recommended to have in next version of the equipment. There is a plastic connector fitting for gas purging which should be replaced by metal connectors for better durability. On the first day the plastic connector fitting was broken at our site and we couldn't use the equipment for at least a month while waiting for the replacement. The service from the vendor has been excellent. The substance under investigation is heated in a hermetically sealed vial in the oven. The water vapor released is transferred to the titration cell by a carrier gas. This means that no noxious solubilizers have to be used, side reactions as well as matrix effects are absent and the contamination of the titration cell is avoided. Product News Metrohm USA Debuts a New Look and New Products 24 Feb 2009 Product News 860 KF Thermoprep - simple, safe and precise sample preparation 21 Oct 2008 Easy It’s quick and simple to do Fast Your inquiry will be delivered straight to the manufacturer Free You’re under no obligation Secure We only pass your details on to trusted suppliers at your request Save time Submit your details once and make multiple inquiries. The 890 Titrando is a high-end titrator for volumetric Karl Fischer titrations. Manual for 890 KF Titrando (english). In addition to the Karl Fischer mode (KFT), the high-end titrator is also equipped with the SET mode and can thus perform Manual for 901 Titrando (english). The 874 Oven Sample Processor is used for automatic thermal sample preparation in Karl Fischer titration.
Linguee Look up words and phrases in comprehensive, reliable bilingual dictionaries and search through billions of online translations. Blog Press Information Linguee Apps You helped to increase the quality of our service. With the 851 Titrando coulometric titrations can be performed easily and quickly. 4 04 Coulometric and volumetric titrations with the 852 Titrando The 852 Titrando performs both coulometric and volumetric Karl Fischer titrations. If the water content of the samples is too high for coulometric determination, this is no obstacle for the 852 Titrando as this instrument is able to analyze samples with a water content ranging from a few micrograms to 100. Using the tiamo TM soft ware both techniques can be applied simultaneously. 5 Bromine index The bromine index of a sample is a measure of the number of double bonds that are present. Just as iodine is produced in coulometric Karl Fischer titration, during the determination of the bromine index bromine is produced directly in the titration cell and reacts with the double bonds. With the 851 and 852 Titrandos the bromine index can be determined coulometrically. The determinations require no further accessories the indicator and generator electrodes and the titration cell can also be used for this application. Only the working medium needs to be changed. 05 Schematic of a bromine addition reaction Automatic start of titration It can happen very quickly that the sample is put into the titration vessel before the titration has been started. In this case, conditioning continues until the water in the sample has reacted with the added iodine. Subsequent calculations are impossible and the measurement has to be repeated. With the 851 or 852 Titrando that can no longer happen. The instruments start the titration automatically as soon as sample is added. This means that you save reagents, sample and, above all, valuable time.
6 Automatic reagent exchange safe handling of toxic reagents 06 Using one of the four MSB ports, it is possible to connect Dosinos and Dosing Units to the new coulometers. In this way, the exchange of reagent can be automated, which means that the cell does not need to be opened, so no moisture can get in. This shortens the conditioning times after reagent exchange. Moreover, direct contact with toxic reagents is avoided. Automation pays dividends. Increasing sample numbers, time-consuming sample preparation steps and unattended overnight operation are good reasons for using sample changers. Combined with the 814 USB Sample Processor, 815 Robotic USB Sample Processor XL and 874 USB Oven Sample Processor, the Titrandos offer a high degree of automation. The reagent exchange can be triggered by way of the number of determinations performed, the age of the reagent, its water capacity or the drift value.However, modern reagents Software maintenance for safer and more productive work Protect your investment the smart way Excellence Titrators T5 T7 T9. One Click Titration Efficient, Secure and Modular Natural science laws experience Taking Samples live. The Right Sample. KF Guide 3 The free fatty Free with every IC Food Pack: MagIC Net software Ultrafiltration Ion chromatography (IC) is a versatile, proven We drink it every day. For instance, in humans they enable a variety of enzymes in the body to Showroom Clean Carpet Guaranteed by Excellence Titrator A Guide to co-teaching The OCR A and AS level Chemistry A Specifications. www.ocr.org. Later, you notice that the iodine has sublimed (passed into the vapor state). Determine the number of particles and the amount A) NH3 B) H2O C) HCl D) CH4 7222-1 - Page 1 2) When ammonium chloride crystals are dissolved in water, the temperature of the water decreases. End Point vs. Equivalence Point. Minimizing Titration Error Voyager Pro s Advanced Applications simplify even the Experiment 9. Physical Chemistry Why? Well, let s see.
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