New products

Mokon’s Iceman Full Range Temperature Control System Offers Heating and Chilling in One Package Mokon offers the Iceman Full Range Temperature Control System for applications requiring a combination of heating and chilling. The Full Range system integrates a Mokon circulating water temperature control system with an Iceman chiller to provide heating and chilling from a single, compact unit for optimal performance.


Shaking water-bath
The Shaking Water Bath from Tecator provides accurate temperature control and flexible mixing of liquids and suspensions. A series of exchangeable flask trays offer high incubation capacity for a wide range of sample sizes. The electronically controlled thermostatic water-bath has a mechanically driven shaking trolley. A transparent lid ensures temperature stability within _0.1 C up to 80 C and prevents evaporation loss. Temperature control is done either automatically by presetting of up to three optional temperatures, or manually. The water temperature is digitally displayed and a cut-out prevents overheating. The  System from Instrumentation Laboratory is described as a consolidated, easy-to-operate and cost-effective system for analysing electrolytes, routine chemistries, special proteins, and therapeutic drugs, thus meeting up to 98% of current laboratory requirements. The system utilizes multiple detection techniques, including absorbance, fluorescence, light scatter, and potentiometry. And the Monarch offers the user a choice of test modes: random access patientprioritized, time-optimized, and stat sampling.
The instrument couples an on-board capability of 23 tests (using ISE) with fast, easy change-over to additional IL-developed tests and verified applications for EIAs, FIAs and special chemistries. Programmable capacity on the Monarch system runs as high as 100 tests.
For convenience, IL-Test reagents come in prefilled BoatIL containers which can be transferred directly from the package to the system's reagent tray. The BoatIL containers include bar-coded labels, which the system scans prior to analysis to assure that the requested reagents are loaded on the tray; the barcoding feature also allows operators to load multiple containers of the same reagent on one reagent tray.
Test set-up consists of a few basic keystrokes on the system's modifiable direct action keyboard. Users can program and identify--on a single key--the profile groups and individual tests most often requested in the laboratory.
Once testing starts, the system's software co-ordinates micro-parallel analysis and robotic cuvette transport-attaining throughput of up to 600 tests. The Monarch also performs the following functions, each in parallel: loading and sample analysis; chemistry and electrolyte analysis; and analysis on all cuvettes. Ion 85 or Ion 83 specific analysers. Secondly, the applications laboratory have prepared information on the titration of gastric aspirate using the ETS 822 system and also pancreatic function testing. Finally, a further titration application for free fatty acids in sebum useful in dermatological studies.

Further information from
The Ion 85 or Ion 83 specific-ion monitoring system can be used in conjunction with a fluoride-ion selective electrode to assist in the evaluation of dosing drinking-water with fluorides, as well as the rate of uptake of fluoride by tooth enamel.
Gastric aspirate titrations are used to monitor acid production in the stomach, the samples tending to be both viscous and discoloured, thus making manual titrations difficult. With a Radiometer ETS 822 end-print titration system this task can be fully automated giving results on just .2 ml of aspitate. A single DEM unit does the work of 12 of the existing cellsyet occupies no more space than one of them. In addition to saving production space, a plant composed of DEM cells has fewer electrical connections. Because it is an enclosed system, there is less risk of spillage and product contamination is avoided. It is also safer because solids build-up is avoided in the electrode area and quality checks can be made by taking one sample from a single cell instead of one from each. Finally, faster switching from the manufacture of one grade of product to another enables Steetley Chemicals to match its output more closely to the demands of the market.
The DEM cell has been shown to. be able to synthesize a range of both organic and inorganic chemicals including naphthaquinone, aromatic aldehydes, aliphatic and aromatic carboxylic acids, chlorates and hypochlorite. Proven materialsrecovery processes include regeneration of chromic acid and other oxidants and the recovery of caustic soda and acid from spent sulphates.
A further advantage of the cell is that it is relatively easy to scale up from a pilot plant to full production. The dished electrode design with small inter-electrode gaps of between 2 and 7mm gives excellent flow characteristics enabling high productivity rates to be achieved. places it in the DSC-4 sample holder, and closes the sample holder enclosure cover. The DSC experiment, which has been set up in the Robotic System software program on the thermal analysis data station TADS), is then automatically performed. When the experiment is complete, the data is automatically stored on disk and, if necessary, a repeat experiment is performed on the same sample. When a run is complete, the robotic arm removes the sample, replaces it in its original position on the carousel, and selects another sample for analysis. Perkin-Elmer's new GPC systems demonstrate the importance of a co-ordinated system approach in realizing the full benefits of highresolution, high-speed GPC for quality-control applications. A typical system is designed around the Series 10 isocratic pump, which is suited to dedicated GPC applications because ofits ease of use and flow rate stability. The two most common types of detector used in GPCrefractive index and ultra-violet absorption-are available for the system. The LCo25 refractive index and LC-95 UV/Vis detectors provide low instrumental band broadening, low noise and fast detector response.
'Mixed bed' GPC columns, with a broad operating range of over four decades in molecular weight, are included. These columns reduce analysis times to minutes, rather than hours, with a corresponding saving in solvent consumption.
Raw data are acquired and stored on disk using the Chromatographics 2 chromatography data system based on the Model 3600 Data Station. GPC5 data-processing software can then be used to interpret the stored data. The software is extremely easy to use through the keyboard and screen of the Model 3600. It computes column calibration curves, molecular weight averages and normalized molecular weight distribution. The results of these calculations may also be stored on disk. Molecular weight averages calculated from GPC data can be produced to within less than 1%.
For further information contact Perkin-Elmer Ltd, Post Office Lane, Beaconsfield, Buckinghamshire HP9 1QA, UK. The RC1 reaction calorimeter from Mettler which measures heat Jlow in chemical reactions and physical transformations. All reaction design data can be determined automatically and reproducibly under conditions close to those during actual operation. The RCl consists of a twin-walled reactor (effective volume 21) and a glass cover with several openings for measuring sensors and dosage additions. A heat transfer mediumJlows between the inner and outer walls of the reactor to allow heat to be supplied to or withdrawn from the reaction medium. A stirrer, a thermostat and an electronic control unit are also fitted. The control unit carries out the instructions entered by the user on the attached PC. The R C1 is suitable for use in process development or for safety investigations and trial production runs. Full information from Mettler Instrumente A G, CH 8606 Greifensee, Switzerland.

VEGAa new GC
Erba Science, the UK subsidiary of Carlo Erba, has introduced a compact gas chromatograph for all column types. The principal feature of the VEGA is its ability to accept a wide range ofdetectors and injectors, all controlled from the keyboard, in a unit that will take upl9 in of a bench.
Included in the range of injectors is the Carlo Erba cold on-column injector. User-friendly control is achieved through an interactive keyboard/ video and a multi-ramp temperature programmer. Two RS 232C output ports are included as standard. The instrument is also fully modular with existing Carlo Erba accessories; this makes it suitable for individual or automatic analysis with cold oncolumn, headspace, cryogenic focusing or liquid injectors.
Instrument programming and control functions are all entered through the keyboard. Comprehensive menus are provided on the video display, where the required parameters are entered with the aid of a cursor. Two programs may be entered and retained for recall as required: for example, they may be activated in turn during a series of automatic analyses in conjunction with an autosampler. A novel feature of the VEGA's temperature programmer is that the alternative program may be recalled to the CRT and edited while the other program is operating, without in any way affecting the storage or implementation of the operating program. Alternatively, the operating program may be edited during an analysis. The video will also display all program parameters in conjunction with a real-time display of oven temperature progress through a multi-ramp program. High-speed acquisition ofcontinuous spectra has research, product development and testing, and processcontrol applications. It is suited for analysis of dynamic events or cycles where the spectral emission or absorption may be changing rapidly. The electrode permits direct potentiometricmeasurement of sodium ion activity in aqueous solutions. It exhibits excellent Nernstian response from to 10 -6 molar sodium concentration, and will give analytically useful results down to 10-7 molar, in the 0 to 80 C range.
The body of the Fisher unit is rugged polymer, making it especially suitable for demanding applications in food technology. Several modes of operation are illustrated with a mixture of rhodamine dyes separated by HPLTC. Injqgure 1 directJluorescence is shown. The developed plate was scanned from a point which includes the origin spot (0), and four developed spots. The fluorescence of each spot was monitored with fixed excitation wavelengths of 350 nm and 540 nm respectively. Figure 2 illustrates fluorescence quenching. Excitation of the silica gel substrate of the plate at 265 nm results in a green background fluorescence. Absorption of 265 nm light by the various spots reduces this fluorescence, but also activates some sample fluorescence. The primary effect is a quenching of the substrate fluorescence, which is why the peak deflections are mainly negative.
Figure 3 demonstrates reflectance. The excitation and emission monochromators have both been set to 500 nm. Each spot absorbs some of the 500 nm light from the excitation beam, so that the reflected light o f this wavelength as detected by the emission monochromator is reduced; hence, peak deflections are again negative. These two latter modes of operation are usefulfor compounds which absorb but do not fluoresce.