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UDK 139
Semi-automatic Distillation Unit
Operating manual
Velp Scientifica thanks you for choosing the UDK 139 Semi-automatic Distillation Unit. The
UDK 139 is designed to perform nitrogen and protein content determination according to the
Kjeldahl Method (TKN) in the Food & Feed industry and has several other applications in
environmental control (nitrogen in water, soil and lubricants) and in the chemical and
pharmaceutical industry according to official AOAC, EPA, DIN e ISO procedures.
Safety warnings:
Before using the unit, please read the operating manual supplied with the apparatus
carefully.
Warning! Hot surface!
Do not dispose of this equipment as urban waste
This unit must be used for laboratory applications only.
The manufacturer declines all responsibility for any use of the unit that does not comply with
the instructions.
SAFETY PRECAUTIONS
In order to prevent the risk of electric shock, fire and personal injury when the unit is in use,
basic safety measures must always be taken including:
Ensure that liquids do not come into contact with the electric power cable or with the
electrical parts of the instrument.
Check that the power supply corresponds to the rating plate on the rear of the unit.
When replacing the power cable, make sure that the new cable has the same
characteristics as the original and that it is earthed.
Do not use the unit if it is not working correctly. In case of malfunctioning, contact your
nearest service centre.
The personal protective equipment must be compatible with the possible risks posed by
the material being processed and the glass of the containers.
The test tube reaches a temperature of 100°C during distillation and also during the
cooling phase. Use the pincer supplied to remove the test-tube at the end of distilling.
The vessels and the products used during the work-cycle must be compatible with the
temperatures reached by the unit (approx. 100°C).
For further information on the handling of the reagents see Chapter 2 «Chemicals».
Leave the transparent guard in place when the unit is running.
Follow the cleaning instructions described in this manual
The safety of the instrument is no longer guaranteed in the case of improper use or if the
instructions in this manual are not followed.
10004762/B5
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Summary of Contents for Velp Scientifica UDK 139
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Table of Contents for Velp Scientifica UDK 139:
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Velp Scientifica – UDK139 Operating Manual 10004762/B5 95 25 — Kjeldahl method to determine total nitrogen in urea The method is suitable for the determination of urea content in aminoplastics, i.e. urea-formaldehyde resins. Procedure 1) Sample: the sample is ground in order to obtain a powder very fine and homogeneous . 1g of sample accurately weighed is quantitatively transferred in a test tube. 2) Reagents for digestion. for each sample add in the test tube: 2 catalys
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Velp Scientifica – UDK139 Operating Manual 10004762/B5 44 5.1.3. Warning signals and messages Warning signals during the work-cycle Insufficient cooling water The unit is fitted with flow meter that measures the cooling water flow rate. If the tap has not been turned on or the tap water flow rate is too low: — when the instrument is turned on, the display shows «AL10. Flow rate H2O insufficient» to remind the operator to restore a sufficient flow of water: — in the case of ins
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Velp Scientifica – UDK139 Operating Manual 10004762/B5 20 In each sub-menu the arrow in the upper left corner allows you to return to the previous screen. 207
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Velp Scientifica – UDK139 Operating Manual 10004762/B5 32 It is also possible check the correct functioning of safety devices, level sensors and the cooling water detector. NOTE: it is fundamental that all the checks are carried out during installation in order to fill the hydraulic circuits. Velp recommends the use of the automatic controls during this phase. Manual check-up Select “Manual check-up” from the “Check-up” menu. The fol
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Velp Scientifica – UDK139 Operating Manual 10004762/B5 27 Press button to move to the next window. Press button to return to the previous window. NOTE: upon receipt of the instrument all customizable methods include default parameters entered by Velp. Use the touch-screen to select each parameter and modify the value. Select Method and use the alphanumeric keypad to enter or modify the name of
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Velp Scientifica – UDK139 Operating Manual 10004762/B5 98 28 — Kjeldahl method to determine gelatin on paper During paper manufacture animal glue or gelatin, casein and soya proteins are used as bonding agents. Kjeldahl’s method gives reliable results for the protein content if other nitrogen compounds are not present (e.g. synthetic resins for improving resistance to humidity). Procedure 1) Sample 2 g about of paper cut in pieces of 1 cm 2 2) Reagents for digestion To each sample add in the test tube: 2 catalyst tablets ST (code CT00
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Velp Scientifica – UDK139 Operating Manual 10004762/B5 74 4 — Kjeldahl method to determine the protein content on peanuts and Brazil nuts Procedure 1 Sample: grind the sample by a suitable device. Weigh 0.5-0.8g of sample with an accuracy of 0.1mg. 2 Reagents for digestion: for each sample add in the test tube: 2 catalyst tablets CM (code CT0006650) 12 ml concentrated sulphuric acid (96-98%) 2 antifoam tablets S (code CT0006600) shake gently the test tube 3 Digestion: 60 min at 420 °C. 4 Cooling:
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Velp Scientifica – UDK139 Operating Manual 10004762/B5 48 14. Start analysis. 15. An acoustic signal indicates that the work cycle has terminated. 16. Remove the test tube and replace it with a new sample. If distillation series has finished, place an empty test tube in the unit. 17. Press to start a new analysis. 7. End-of-work operations Before turning the instrument off at the end of the working day carry out a wash- down from the “Analysis” menu; At the end of the was
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Velp Scientifica – UDK139 Operating Manual 10004762/B5 53 8.3. Expedients for transport The instrument must be transported in its original packaging and any indications present on the original packaging must be followed (e.g. palletised). The caps must be placed on the hydraulic connections. NOTE: The tubes of the hydraulic circuit must be emptied and washed in order to avoid reagent residues causing damage to the unit during the transport.
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Velp Scientifica – UDK139 Operating Manual 10004762/B5 112 37 — Method to determine nitric nitrogen on water after reduction to ammonia nitrogen (Devarda’s alloy method) Nitric nitrogen content on municipal wastewaters treated in wastewater treatment plant can vary between 0 and 15 mg/l N-NO 3 depending on nitrification systems and on water consumption of the served population. High concentrations permit to perform the reduction of nitr
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Velp Scientifica – UDK139 Operating Manual 10004762/B5 65 Catalysts Mercury is considered the best catalyst for Kjeldahl oxidative digestion, but its toxicity for man and the environment brought to dismiss its use. The same can be said for Selenium. To-day Copper sulphate (CuSO 4 • 5 H 2 O) with lower environmental damage is commonly used. It is pre
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Velp Scientifica – UDK139 Operating Manual 10004762/B5 102 Collect the distillate in the 200 ml graduated flask used to measure the wine quantity. *set a distillation time to obtain a maximum of 200 ml of distillate. After the distillation, position the receiving flask in the thermostat for about 15 min. and finally bring up to volume (200 ml) using distilled water at 20 °C. 4) Density of the Distillate Measure the density of the distillate through a pycnometer: 1. Weigh the empty pycnometer, clean an
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Velp Scientifica – UDK139 Operating Manual 10004762/B5 46 5.3. Graph of tap water consumption related to the water flow rate and temperature The graph below shows the efficiency of the patented Velp titanium condenser compared to traditional glass condensers. It is important to underline how the new titanium condenser keeps the temperature of the distillate below the threshold value (35°C) indicated by the Kjeldahl method without increasing the tap water flow rate (1l/min). NOTE: The Kjeldahl method recommends a maximum distill
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Detail Specifications: 1345/1345656-udk_139.pdf file (19 Jan 2023) |
Accompanying Data:
Velp Scientifica UDK 139 Distilling equipment PDF Operating Manual (Updated: Thursday 19th of January 2023 08:30:39 AM)
Rating: 4.5 (rated by 94 users)
Compatible devices: MODULAR 60, K-350, WATER DISTILLER, ALCOENGINE, RV 3 eco V, EZ KIT, D4000/EURO, RCAD 20.
Recommended Documentation:
Text Version of Operating Manual
(Ocr-Read Summary of Contents, UPD: 19 January 2023)
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74, Velp Scientifica – UDK139 Operating Manual 10004762/B5 74 4 — Kjeldahl method to determine the protein content on peanuts and Brazil nuts Procedure 1 Sample: grind the sample by a suitable device. Weigh 0.5-0.8g of sample with an accuracy of 0.1mg. 2 Reagents for digestion: for each sample add in the test tube: 2 catalyst tablets CM (code CT0006650) 12 ml conce…
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54, Velp Scientifica – UDK139 Operating Manual 10004762/B5 54 9. Disposing of the unit For the temporary decommissioning always empty the tubes of reagents and solutions, sodium hydrate in particular, as described in «Expedients for transport”. The instrument is classified as electrical/electronic apparatus and must be disposed of accordingly. The unit…
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28, Velp Scientifica – UDK139 Operating Manual 10004762/B5 28 4.5. Set-up Select Set-up from the «Main» menu. The following submenus are listed: To return to the «Main» menu press the arrow top left. Press to move to the next window. Press to return to the previous window. Select Date and use the numeric keypad to enter or modify the date. Pre…
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120, Velp Scientifica – UDK139 Operating Manual 10004762/B5 120 42 — Determination of ammonia nitrogen in organic fertilizers according to the Kjeldahl method Procedure 1) Sample: the sample must be ground in order to obtain an homogeneous powder (particles dimension 1mm). 0.7-3.5g of sample are then accurately weighed (with a precision of 0.1 mg) and quantitatively transf…
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63, Velp Scientifica – UDK139 Operating Manual 10004762/B5 63 17. General description of Kjeldahl’s method for the measurement of organic Nitrogen Since its first introduction, more than a century ago, the method underwent different changes in digestion temperature and time, acid concentration and oxidation catalysts. As an example, during years ’30 the use o…
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37, Velp Scientifica – UDK139 Operating Manual 10004762/B5 37 Press and follow the instructions on the display. The green flag on the right indicates that the operation was carried out correctly, a red X indicates that the operation was not successful. The procedure can be interrupted at any time by pressing . Press the arrow top left to return to the «…
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56, Velp Scientifica UDK 139 Velp Scientifica – UDK139 Operating Manual 10004762/B5 56 12. Technical features GENERAL Power supply (AC) V/Hz 230~(+/- 10%)/50-60 Total electric power W 2200 Heating element power W 2000 Dimensions (W x H x D) mm 385x780x416 inch 15.2×30.7×16.4 Weight kg 26 lb 57.3 Display LCD graphic touch-screen Langu…
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55, Velp Scientifica UDK 139 Velp Scientifica – UDK139 Operating Manual 10004762/B5 55 11. Spare parts Description (see chapter 1.2): Code Positioning disk with tube support 40001706 Standard test tube connection 10002322 Plastic guard for test tube connection 10004708 Inlet tube for H 2 O 40000153 Inlet tube for NaOH 40001023 Outlet tube for d…
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44, Velp Scientifica – UDK139 Operating Manual 10004762/B5 44 5.1.3. Warning signals and messages Warning signals during the work-cycle Insufficient cooling water The unit is fitted with flow meter that measures the cooling water flow rate. If the tap has not been turned on or the tap water flow rate is too low: — when the instrument is turned…
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84, Velp Scientifica UDK 139 Velp Scientifica – UDK139 Operating Manual 10004762/B5 84 14 — Kjeldahl method to determine the protein content on meat and derived products The protein content in fresh bovine meat is about 20% (3% of proteic nitrogen about). Dried salted meats contain about 35% proteins, while salted meat show values between11 and 17%, depending on fat and water content. Pr…
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100, Velp Scientifica – UDK139 Operating Manual 10004762/B5 100 30 — Kjeldahl method to determine total nitrogen on sludges from wastewater treatment plants The final use of sludges from municipal wastewater treatment plants should be on agricultural land for the recovery of useful nutrients. This is suggested also by the Council of European Economic Community …
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NOTICE:If your package is missing parts or you are having issues with assembly, please call us directly at (949)-344-2588. Our customer service team will address any questions or concerns you may have. Please have this manual open and ready for reference.CUSTOMER SERVICE:(949)-344-25888:00AM — 5:00PM PST (Monday — Friday)[email protected]# 048-GM-4837 …
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CE MARK European Directives applicable: — 73/23/EEC – Low Voltage — 93/68/EEC – Electromagnetic Compatibility International Standards: — IEC 60335-1 (1991) Water Distiller (GB) Distillateur d’Eau (FR) Wasserdestillator (DE) Distillatore d’Acqua (IT) Destillador de Agua (ES) Vatten Destillator(SE) Veden Tislauslaite (FN) Destillationsapparat (DK …
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Velp Scientifica – UDK139 Operating Manual
Introduction
Steam distillation is applied in the laboratory for the fractionation of water insoluble
liquids or solids according to Dalton’s law of partial pressures in a gas mixture.
It is also used for stripping chemicals from mixtures or solutions after displacement of
the ionic equilibrium by adding acids or bases, as in the well known Kjeldahl’s
method for total Nitrogen determination.
The Kjeldahl method remains the most used method for determining Nitrogen and
protein contents in foods and feeds (official methods).
This is simply due to its precision and reproducibility.
Since its initial design, many improvements have been introduced aimed at reducing
energy consumption, space requirements and sample quantities.
The UDK 139 Semi-automatic Distillation Unit has a color touch-screen with
electronic control for simple and user-friendly programming of parameters such as
distillation time, the volume of reagents such as sodium hydroxide, water and the
regulation of steam production from 10 to 100% in order to carry out Semi-automatic
distillation.
By modifying the distillation time and steam output it is possible to carry out fast or
slow distillation according to the product being analyzed. For example, the distillation
time for the determination of the protein content according to the Kjeldahl method
can be reduced to three minutes. In other cases (e.g. volatile acids in food products),
the distillation time can be increased to 30 minutes or more.
Analysis times are reduced thanks to the optimization of the applications:
10 programs that can be customized directly by the user.
NOTE: the software can be browsed directly from the touch-screen. Select the option
by hand, using a stylus or a mouse.
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