The required sample volume is only two to ten microliters ten microliters for routine operation and because the technique is. A method is described for determining brain osmolality with a vapor pressure osmometer. The osmometer shall consume no more than 40 watts of electrical power and shall weigh less than 7 kg. Wescors vapro vapor pressure osmometer model 5600 discovery diagnostics ordering information canadian customers please call toll free within canada. Wescor inc model 5600 the vapro vapor pressure osmometer, can be used to determine the osmolality in any type of sample. The vapro 5600 requires a sample volume of only 10 microliters and osmolality is displayed in 90 seconds. The vapor pressure method determines osmolality at room temperature with the sample in natural equilibrium. It stands out for its high performance, data quality, and reliability. This instrument measures dew point temperature depression of a solution in vapor equilibrium in a closed chamber. The wescor vapor pressure osmometer employs the most uptodate method of osmolality determination.
Vapro vapor pressure osmometer order in canada discovery. Measuring relative vapor pressure of organic solvent solutions alcohol, acetone, carbon tetrachloride, toluene, benzine, etc. The vapro users manual is your key to efficiently operating this instrument. Products for chemical applications these units are used in the petrochemical and polymer industries as well as in the research and development laboratories in biochemistry and medical facilities. For sale from wescor vapor pressure osmometer 5500. A device for the determination of molecular weights by the decrease of vapor pressure of a solvent upon addition of a soluble sample explanation of vaporpressure osmometer. The wescor 5500 vapor pressure osmometer brings unprecedented simplicity, convenience, and accuracy to the routine determination of osmolality to help meet the demands placed on todays clinical laboratory. Vapor pressure osmometers determine the concentration of osmotically active particles that reduce the vapor pressure of a solution. The vapro vapor pressure osmometer brings unprecedented simplicity, convenience, and accuracy to the routine determination of osmolality to help meet the demands placed on todays clinical and research laboratory. The fundamental advantages of vapor pressure osmometry are now embodied in the most intelligent osmometer ever produced. The vapro vapor pressure osmometer brings unprecedented simplicity, convenience, and accuracy to the routine determination of osmolality to help. Vapro vapor pressure osmometer brochure pdf catalogs. An osmometer is used to measure the osmotic strength, or osmolarity, of a solution, colloid or compound. Used wescor, vapor pressure 5500, osmometer for sale.
This will give what is known as the solute concentration. As a result, the instrument has great versatility in clinical medicine or biomedical research. Wescor 5500 vapor pressure osmometer in stock, we buy. Wescor elitechgroup vapro 5600 vapor pressure osmometer.
There are different units based on the desired technique used to. Osmometry provides a means of obtaining the activity. The vapro osmometer requires a sample volume of only 10 microliters. Used wecor vapro model 5600 vapor pressure osmometer. Vapor phase osmometry university of texas at austin. The fundamental advantages of vapor pressure osmometry are now embodied in the most intelligent osmometer ever. Vaporpressure osmometer article about vaporpressure.
Osmometer an instrument that can find the osmotic strength of a solution or colloid using data from a semipermeable membrane, freezing point depression or vapor pressure. Statsoft statistica 25 software was used for variance analysis, while microsoft excel 26 was used for graph ics creation. Osmometry a laboratory technique to find the molecular weight of an unknown compound by determining the osmotic strength of a solution. The new vapro can be used to determine the osmolality in any type of sample. The small sample requirement allows you to assay hardtoget or expensive samples using the superior characteristics of the vapor pressure method. The instrument significantly reduces the conventional mo measurement time and is not subject to the limitations of vpo and fpo. The determination of m n operates on the principle that the vapor pressure of a solution is lower than that of the pure solvent at the same temperature and pressure magnitude of the vapor pressure decrease is directly proportional to the molar concentration of solute does not directly measure vapor pressure but measures change in. Vapro vapor pressure osmometer model 5600 order in canada at discovery diagnostics, canadian distributor for wescors vapro vapor pressure osmometer.
Thank you for purchasing the vaprovapor pressure osmometer. The osmometer shall be capable of routine osmolality determinations on sample volumes of 10 microliters and shall perform the measurement automatically once the chamber is sealed. The wescor osmometer measures the vapor pressure relative humidity by measuring the dew point temperature at which water condensate is in equilibrium with. The wescor vapro model 5600 vapor pressure osmometer, can be used to determine the osmolality in any type of sample. Find great deals on ebay for osmometer and osmometer 3320.
The wescor vapro model 5600 vapor pressure osmometer, can be used to. It is a modified isopiestic technique that involves measuring the steadystate temperature difference that develops between a drop of solution and a drop of pure solvent commutually exposed to an atmosphere saturated with solvent vapor. The vapor pressure method is suitable for the determination of the average molecular weight of polymers which are soluble in a variety of different organic solvents and for the. Hemolymph 50 micro1 was removed repeatedly from individual lobsters at 0, 30, 60, and 120 min of exposure to 50, 100, or 150% seawater n 4 for each time point, and osmolarity was measured with a vapor pressure osmometer wescor. Measurement of root and leaf osmotic potential using the vaporpressure osmometer article in environmental and experimental botany 531. The osmometer shall have an automated thermocouple cleaning cycle and not require any routine maintenance. Multiple c52 chambers can be connected to the cr7 datalogger to function as an automated multichannel osmometer as an osmometer, can do rapid, accurate sampling without freezing 10 microliter samples. This item was in working condition at the time it was removed from the lab. Effect of molecular weight of draw solute on water permeation in forward osmosis process masahiro yasukawa, yasuhiro tanaka, tomoki takahashi, masafumi shibuya, shoji mishima. Effect of molecular weight of draw solute on water. Bersted bh 1973 molecular weight determination of high polymers by mean of vapor pressure osmometry and the solute dependence of the constant of calibration.
The vapro vapor pressure osmometer, can be used to determine the osmolality in any type of sample. The instruments are differentiated by the method of measurement and have a. This let the wescor machines take over significant market share. Thank you for purchasing the vapro vapor pressure osmometer. This precludes cryoscopic artifacts due to high viscosity, suspended particles, or other conditions that can interfere with freezing point determinations, giving vapro a much broader range of errorfree applications. Since then, the vapor pressure method has proven itself in thousands of laboratories and myriad applications. An osmometer is a device for measuring the osmotic strength of a solution, colloid, or compound. The findings of this study suggest that with the use of a vapor pressure osmometer, small samples of brain tissue can be measured for osmolality with speed and high repro ducibility and without the need for dilutions, weighings, calculations, and external deter minations of tissue water content. There are several different techniques employed in osmometry. Fast membrane osmometer as alternative to freezing point.
Osmometer 5600 5600et vapro vapor pressure osmometer. Results and discussion monitoring changes of dmc values of osmodehydrated pork meat is good way to compare and estimate. Vapor pressure osmometry paraphrased from the instructions for the wescor osmometer. Simple to use just lower the head to run the test fast 90 second tests highly reliable, with the fewest moving parts available narrow profile design uses only uses 5. Osmometers vapor pressure osmometer k7000 the vapor pressure osmometer k7000 from knauer is an advanced instrument from one of the pioneers in the field of osmometry with 50 years experience. Osmolality was measured with vaprorvapor pressure osmometer model 5600. An apparatus for measuring the acuteness of the sense of smell. Our customers have rendered a clear verdictvapor pressure osmometry is superior to all other methods. It works by taking advantage of the decrease in vapor pressure that occurs when solutes are added to pure solvent. Vapro is the undisputed leader in research osmometry, with capability for any type of samplefluids, viscous or. The osmometer shall be a elitech model 5600 or equivalent and shall operate on the vapor.
Pressure osmometer is read online html help file to pdf converter by an ad converter card installed in one ofthe expansion slots. An instrument for measuring osmolality by freezing point depression or vapor pressure elevation techniques. A vapor pressure osmometer was used to measure the osmolarity of the samples from mcb 32 at university of california, berkeley. Our customers have rendered a clear verdict vapor pressure osmometry is superior to all other methods. The wescor vapro machines are the only game in town when it comes to vapor pressure osmometers due to patent issues. Vapro vapor pressure osmometer brochure elitechgroup. Paraphrased from the instructions for the wescor osmometer.
Fast membrane osmometer as alternative to freezing point and vapor pressure osmometry article in analytical chemistry 807. Biomedical systems self cleaning thermocouple the fundamental advantages of vapor pressure osmometry are now embodied in the most intelligent. Osmometer definition of osmometer by medical dictionary. The osmometer shall be a elitech model 5600 or equivalent and shall operate on the vapor pressure depression principle. Measurement of root and leaf osmotic potential using the. Please note that this unit has not been professionally tested, and is being sold as is. For this paper, the osmotic pressure of aqueous sucrose solutions was collected in a molality range 05. Use of a vapor pressure osmometer to measure brain. The fundamental advantages of vapor pressure osmometry are now embodied in the most. Vapro vapor pressure osmometer elitechgroup benelux. The osmometer shall be capable of routine osmolality determinations on sample volumes of 10 microliters and shall perform the meas urement automatically once the chamber is.
Use of a vapor pressure osmometer to measure brain osmolality. A vapor pressure osmometer was used to measure the. Specifications vapro vapor pressure osmometer model 5600 manufactured by. Vapor phase osmometry vpo, also known as vaporpressure osmometry, is an experimental technique for the determination of a polymers number average molecular weight, m n.
The osmotic strength is a measure of the number of osmoles of solute per litre of solution. The osmometer shall be capable of routine osmolality determinations on sample volumes of 10 microliters and shall perform the meas urement automatically once the chamber is sealed. The chief advantage of the vapor pressure method is that it does not require. Vapor pressure osmometry is a dynamic method of determining the vapor pressure of solutions. In the present work, a novel membrane osmometer is presented. You will find it to be a valuable investment and an important partner in the laboratory. Find great deals on a wide selection of wescor osmometers in auctions, and classified for sale ads on labx. We recommend that you become thoroughly familiar with the operation procedures and troubleshooting techniques. Buyers specifications the osmometer shall be a wescor model 5600 or equivalent and shall operate on the vapor pressure depression principle.