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The composition of the TDS-4 includes the thermal desorber itself (the thermostat of the sorption tube, a cryolovushka, an automatic switching valve, a touch control panel), a heated transition line that is installed in the evaporator\ Technical characteristics of TDS-4 Temperature of thermal desorption, 0C to 400 The heating rate of the sorption tube, 0C/min up to 500 Trap temperature, 0C from minus 25 to 400 Trap heating speed, 0C to 2000 The method of heating the trap is direct Tap heating temperature, 0C to 250 Transition line heating temperature, 0C to 250 Continuous operation mode Dimensions of the sorption tube, (diameter; length), mm. Material glass, stainless steel 5/114 (on request 6/115, 6,3/89 and their combinations) Tube material glass or stainless steel (SS316) Method of trap cooling without using liquid refrigerant The number of regulated gas flows is not less than 2 There is an automatic leak test function There is a function of automatic purging of the sorption tube Electric power supply from 187 to 242 V, 50 Hz Power consumption, W not more than 700

The reverse purge valve is a 4-way valve designed to change the direction of the flow of the eluent through the nozzle column and blow off heavy components from the beginning of the column in the opposite direction into the detector. The crane is attached to the bottom panel (bottom) of the module, while taking the temperature of the column thermostat. The two upper fittings (see Fig.) are used to connect the column, the other two are connected to the evaporator and the detector.

The characteristics of the device are similar to the GVCH-12D model; the difference is in the absence of a reactor to remove traces of oxygen and the capacity, respectively, is 25 liters/hour (416 ml/min). Technical specifications Purity of hydrogen in terms of dry gas about 99.998% The concentration of water vapor at 20 OC and 1atm is not more than 10 ppm In the output pressure stabilization mode The range of the specified output pressure of hydrogen is from 1.5 to 6.1 ati Stability of the output pressure of hydrogen is not worse ± 0.02 ati Maximum hydrogen capacity, reduced to normal conditions is 25 l/h The time of setting the operating mode, with the output turned off is no more than 20 minutes In the performance stabilization mode: The range of the specified hydrogen performance is from 0 to 25 l/h Maximum developed pressure in performance mode is 5.0 ati Volume of distilled water to be poured is 1.0 l Distilled water consumption is not more than 0.04 l/hour Water consumption is 2.4 g/l of hydrogen The average life of a replaceable deionization filter cartridge (at maximum performance and single-shift operation) is at least 0.5 years Average power consumption: in stationary mode is no more than 200 VA maximum (at startup) is no more than 250 VA Overall dimensions of the generator, (width x depth x height) are not more than 230x470x450 mm The mass of the generator is not more than 16 kg Operating conditions: ambient temperature, °C, from +10 to +35 powered by single-phase AC voltage, V, 220 (+10 -15)% and frequency, Hz, 50 +1 The generator for electrical safety meets the requirements of Class 1, type H according to GOST 12.2.025-76

GC and MS interface Capillary direct interface, independent temperature control (50-300 0 S) The filament of the cathode (filament) is a double filament for electron ionization (EI), the maximum current is 300 µA. Double thread increases the service life. Two independent switchable cathodes Temperature of the ion radiation source Independent heating and temperature control, maximum value 350 0 C (adjustable) Transparent polymer window on the front panel there is no visual control of the state of the cathodes Ion radiation source Lenses made of ceramic and with a patented coating enhance the focusing effect, which significantly increases the efficiency of ionization, an electrode with a patented reflective surface improves focusing Tubular lenses enhance the focusing effect, which significantly increases the ionization efficiency, an electrode with a patented reflective surface improves focusing Energy ionization 10-100 eV The mass analyzer is a high-precision quadrupole with a filter that reduces the contamination of the main quadrupole and eliminates the influence of photonic noise on the analysis High-precision molybdenum quadrupole with prequadrupole (replaceable), which reduces the contamination of the main The detector is an electronic multiplier with a high-voltage secondary emiting electrode (dinode) of high energy 3D geometry to improve sensitivity. The amplifier of weak voltage signals effectively reduces network noise, improves the signal-to-noise ratio during electron ionization and provides a large linear dynamic range. It is possible to install an additional detector Mass range 2.0-1200 a.e.m. 1.5-1050 a.e.m. Mass stability Less than 0.1 a.e.m. for 48 hours Signal ratio noise At least 1500:1 with mass to charge (m/z) 272 At least 150:1 with mass to charge (m/z) 272 (with signal filtering 500:1) Linearity Not less than 107 Not less than 106 Precision < 5% RSD 9n=7, SIM, 100 fg OFN) no System sensitivity IDL < 10 fg (SIM mode, OFN according to m/z 272) no Maximum scanning speed 20000 a.m./s 11000 a.m./s Operating modes Scap, SIM, Scan/SIM, MicroScan and the innovative Flexible-SIM algorithm for finding trace amounts of components no Setting Automatic setting MSD on the PFTBA spectrum and m/z control of oxygen, nitrogen and water no Pumping pump Oil plate-rotor vacuum pump with a pumping speed of 66 l/min Oil plate-rotor vacuum pump with a pumping speed of 165 l/min Turbo pump Turbo molecular pump with magnetic levitation, with a pumping speed of 85 l/s (can be replaced by 300 l/s) Turbo molecular pump with magnetic levitation, with a pumping speed of 71 l/s (possible replacement by 260 l/s) RF detector power Allows you to use three points for calibration in the entire mass range and get good linearity in scanning mode Software Rus./ Eng. The ability to search and extract structural, graphical formulas. Library of 240,000 spectra. The ability to isolate individual components from overlapping peaks. In addition to spectra and compounds, the library contains the element name, formula, molecule structure, molecular weight, CAS number, analysis conditions, synonyms, and estimated or measured retention readings. The NIST EI library contains: drugs, metabolites and poisons, pesticides and fungicides, organic substances present in soil, water and air, amino acids, di- and tripeptides, common sample pollutants, common analytical derivatives, etc. Ethernet interface, remote access function implemented Touch screen Display of parameters and monitoring of system status no Built -in power supply Allows you to turn off the detector in normal mode if there is no power supply violation

Nitrogen generators are designed to create an inert atmosphere, fill low-pressure tanks and other applications that require a large, by laboratory standards, nitrogen consumption with reduced requirements for its purity. The warranty period of operation of the generator is 12 months from the date of sale by the manufacturer. Technical specifications Volume fraction of nitrogen is not less than % by volume (including impurities of inert gases — argon, neon, helium) 99.5 Volume fraction of oxygen is not more than 0.5 % vol. Volume fraction of water vapor is not more than, % vol. 0.002 (20 ppm) Maximum nitrogen capacity is at least 400 l/h (6.66 l/min) The time of setting the operating mode for single-shift operation is no more than, min, 30 Nominal inlet air pressure is 6 ati Maximum allowable inlet air pressure is 8 ati Minimum inlet air pressure is 5.5 ati Compressed air consumption, at nominal inlet pressure and maximum flow rate is no more than 3000 l/h (50 l/min) Power consumption is not more than 100 VA Overall dimensions, (width x depth x height) are not more than 230x580x680 mm; Weight is not more than 30 kg Working conditions: ambient temperature, C°, from +10 to +35 Electric power supply from single-phase AC mains voltage, V, 220± 10% and frequency, Hz, 50 ± 1 Average full service life is at least 6 years The generator for electrical safety meets the requirements of Class 1, type H according to GOST 12.2.025-76

The oil-free compressor is designed to supply air to laboratory nitrogen and oxygen generators, purge optical systems of laboratory devices with dry air, etc. A feature of the device is the presence of a built-in automatic regeneration system of the air drying filter, which frees the user from routine maintenance. Small dimensions, low noise level, lack of maintenance work allow the compressor to be placed in the laboratory room and make working with it easy. Technical specifications Rated output, reduced to normal conditions is 7.0 l/min Maximum output, reduced to normal conditions is 9.0 l/min The range of the set output pressure is from 1.0 to 6.0 ati Output pressure stability at constant flow rate is not worse than ± 0.2 ati Stability of the output pressure when the flow rate changes from 0.5 to the maximum value is not worse than ± 0.4 ati The dew point of the outlet air at an ambient temperature of 20 ° C and rated capacity is not higher than minus 30 ° C The dew point of the outlet air at an ambient temperature of 20 ° C and maximum performance is not higher than minus 15 ° C Volume of the built-in receiver is 6 l The noise level of the device is not more than 50 db Ready time after switching on is no more than 10 min Power consumption is not more than 600 VA Overall dimensions of the device (width x depth x height) are not more than 230x580x530 mm Weight of the device is not more than 27 kg Working conditions: ambient temperature, °C from +10 to +35 relative humidity of the ambient air, % 80 power supply from a single-phase network: AC voltage, 220 ± 10% and frequency, Hz 50 ± 1

The characteristics of the device are similar to the GCHA-18 model; the difference is that the oil–free compressor built into the GCHA-18-K generator provides complete autonomy of the device. The warranty for the device is 18 months, for the built-in compressor-12 months from the date of sale.

The metering valve for the analysis of liquefied gas (KDSG) is designed for the introduction of liquefied gas or other liquid under excessive pressure into the evaporator of the chromatograph. KDSG is a 4-way crane, in which a dose of a certain volume is installed. The tap is installed on the evaporator of the chromatograph. A dose of any volume can be installed on the tap. Dose change can be performed by the operator. The amount of the dose volume is indicated on the tag. Technical specifications The dose volume is from 0.25 to 4.0 µl (at the request of the consumer, the dose volume can be increased up to 10 µl). The tap temperature is no more than 150 °C. The pressure in the crane line is not more than 0.48 MPa. The angle of rotation of the crane handle is 90 °C.

The characteristics of the device are similar to the GVCH-12A model. The difference is the generator capacity of 25 liters / hour, the purity of the produced hydrogen is lower (99.9995% vol). Technical specifications Purity of hydrogen in terms of dry gas шы about 99.9995% Concentration of water vapor at 20OC and 3 atm is no more than 7 ppm Total hydrogen capacity reduced to normal conditions is 25 l/h The range of the specified output pressure of hydrogen is from 3.0 to 6.1 ati Stability of the output pressure of hydrogen is not worse than ± 0.02 ati The time of setting the operating mode, with the output turned off is no more than 30 min Volume of distilled water to be poured is 1.0 l Distilled water consumption is no more than 0.04 l/h Water consumption is 1.6 g/l of hydrogen The average life of a replaceable deionization filter cartridge (at maximum performance and single-shift operation) is at least 0.5 years Average pump life (for single-shift operation) is at least 0.5 years Power consumption: in stationary mode is no more than 250 VA maximum (at startup) is no more than 280 VA Overall dimensions of the generator, (width x depth x height) is not more than 230x470x450 mm The mass of the generator is. not more than 18 kg Operating conditions: ambient temperature, °C, from +10 to +35 powered by single-phase AC voltage, V, 220 (+10 -15)% and frequency, Hz, 50 +1 The generator for electrical safety meets the requirements of Class 1, type H according to GOST 12.2.025-76

The characteristics of the device are similar to the GVCH-12A model. The difference is the generator capacity of 16 liters /hour. Technical specifications Purity of hydrogen in terms of dry gas is about 99.9999% Concentration of water vapor at 20OC and 1atm is not more than 5 ppm Total hydrogen capacity, reduced to normal conditions is not less than 16 l/h The range of the specified output pressure of hydrogen is from 3.0 to 6.1 ati Stability of the output pressure of hydrogen is not worse than ± 0.02 ati The time of setting the operating mode, with the output turned off is no more than 30 min Volume of distilled water to be poured is 1.0 l Distilled water consumption is no more than 0.03 l/hour Water consumption is 1.6 g/l of hydrogen The average life of the replaceable cartridge of the deionization filter (at maximum performance and single-shift operation) is not less than 1 year Average power consumption: in stationary mode is no more than 220 VA maximum (at startup) is no more than 250 VA Overall dimensions of the generator, (width x depth x height) are not more than 230x470x450 mm The mass of the generator is not more than 17 kg Operating conditions: ambient temperature is from +10 to +35 °C powered by single-phase AC voltage, V, 220 (+10 -15)% and frequency, Hz, 50 +1 The generator for electrical safety meets the requirements of Class 1, type H according to GOST 12.2.025-76

We offer expert laboratories of physicochemical methods of analysis a gas chromatograph with a quadrupole mass spectrometric detector «MAESTRO-αMS». Quadrupole GC-MS «MAESTRO-αMS» is in demand for targeted research (screening) and non-targeted search. In targeted studies, it is necessary to detect given target compounds in samples of various nature and origin at the level of residual amounts, for example, several picograms of the target compound in the injected 1 μl of liquid sample. Most often, targeted research is carried out in the following areas of laboratory screening: ecology, food safety, clinical monitoring, narcology, doping control, production control of various raw materials. In targeted studies, it is often required not only to confirm the presence of a compound in a sample, but also to determine the level of its content quantitatively, since both the list of target compounds and the permissible level of their presence in the sample are specified by regulatory documents. Quantitative analysis requires standards for the substances you are looking for. When conducting a non-target search, as a rule, it is required to analyze a sample of unknown composition, in other words, to find as many compounds as possible in the sample and identify (identify) each of them. Since the identification of a detected compound is carried out by comparing its experimental mass spectrum with the spectrum of a pure substance obtained under standard conditions, this task requires reference libraries of mass spectra of pure substances, as well as tools for working with mass spectra, for example: algorithms for cleaning experimental mass spectra from background and spectral noise (mass spectrum deconvolution algorithms), library search and comparison algorithms. An off-target search is called a qualitative analysis, since the researcher is primarily interested in the list of detected substances, and not in the quantitative assessment of their content in the sample. When creating MAESTRO-αMS, we took into account our own many years of experience in operating imported analogues. We have made the device inexpensive. We have made the device compact: The modern design of the device made it possible to make the MAESTRO-αMS really compact, so that the device occupies the smallest possible area on the laboratory table. The layout of the device allows you to remove the ion source on the front flange for cleaning and replacing the cathodes, if necessary. We have reduced the cost of operation: When developing the MAESTRO-αMS, we sought to increase the resistance of the device to sample matrices and use a minimum of consumable materials in order to eliminate downtime for maintenance and replacement. As a result, we have created an extremely stable ion source and a perpetual photomultiplier detector. We have created special software: Even at the first acquaintance with the software, it becomes obvious that being in the window of each button and each parameter to be changed is expedient and logical. Our software product was created for the convenience of the operator, so we implemented the necessary and eliminated the unnecessary. We used the principle of one active window, in which the operator moves sequentially step by step, performing hardware settings, setting the data collection method, subsequent processing algorithms, templates for presenting the results. MAESTRO-αMS offers a wide range of scanning modes, built-in algorithms for working with mass spectral data, convenient unloading of initial data arrays for their processing in specialized software packages, graphics export for presentations and scientific publications. You can use several libraries of mass spectra at the same time, or create your own for your typical tasks. Finally, we provide a 5-day training course for professionals who want to understand the theoretical foundations of the method and their implementation in the hardware of modern quadrupole GC/MS. The volume and depth of presentation of the material from the developers of the device is intended to lay the foundation for the effective use of «MAESTRO-αMS» in the future. Some technical characteristics of MAESTRO-αMS: • Instrumental detection limit (SIM, OFN @272 m/z ) < 10 fg; • Scan modes: scan for selected ions, full scan in a given mass range, combined scan mode; • The number of simultaneously connected libraries of mass spectra is at least 10.