دست دوم

Compact, bench-mounted, simultaneous Inductively Coupled Plasma Optical Emission Spectrometer (ICP-OES) with axially or radially viewed plasma, free running air-cooled, 40 MHz RF generator, purged echelle polychromator and thinned back-illuminated MegaPixel (MPX) Charge Coupled Device (CCD) detector.

The sample introduction system is designed for rapid washout. Four orders (10,000 x) signal washout can be achieved for most elements in less than 45 seconds.

Nebulizer gas–choose from manual high precision pressure regulator or computer controlled Mass Flow Controller
(MFC).
Nebulizer gas 0-1.3 L/min in 0.1 L/min increments (MFC).
Plasma gas 0-22.5 L/min in 1.5 L/min increments.
Auxiliary gas 0-2.25 L/min in 0.75 L/min increments.

Choose from built-in 2 or 3 channel, 10 roller peristaltic pump under full PC control including Fast Pump™ facility to improve productivity. Fast Pump operates the pump at full speed during the defined sample uptake period to improve sample throughput. The 3 channel PC controlled peristaltic pump allows for addition of reagents or internal standards.

The peristaltic pump automatically drains the spraychamber outlet to waste.

An Argon Saturation Accessory (ASA) is available as an option. The ASA humidifies the nebulizer gas to reduce nebulizer and injector tube blockage from high salt solutions.

Vista-MPX features a 40 MHz air-cooled free running RF generation system. It has no moving parts, for enhanced reliability. Power output is selectable from 0.7 to 1.5 kW

DIrect Serial Coupling (DISC™) provides over 75% power transfer efficiency into the plasma by eliminating the need for inefficient secondary matching networks.

Vertically oriented, radially viewed plasma is ideal for high dissolved solids (up to 30% TDS) applications, providing immediate venting of excess heat and plasma emissions to overhead exhaust ventilation. Includes full PC control of plasma viewing height from 0-20 mm and horizontal adjustment of ± 3 mm to optimize sensitivity and minimize interferences. Viewing height may be adjusted under PC control on a per wavelength basis.

Horizontal, axially viewed plasma is ideal for high sensitivity analyses. Provides a 5-10 fold improvement in detection limits compared to radial viewing. The axially viewed plasma system features a unique Cooled Cone Interface (CCI) with a patented Anti-Arcing Resonance Coil (AARC) to eliminate the cooler plasma tail from being viewed by the optics. This reduces interferences and improves the system’s tolerance to high dissolved solids (up to 5% for continuous daily operation). The CCI is a superior alternative to the use of an expensive and
inefficient shear gas. The CCI provides extended dynamic range compared to conventional axial systems. Includes full X, Y adjustment of plasma viewing position under PC control.

Periodic wavelength recalibration based on plasma argon emission lines is automatic. This eliminates the need for Hg or Ne lamps that require warm-up and periodic replacement.

The MPX megapixel CCD detector features 1.12 million pixels, each 15 microns x 15 microns, in an X-Y grid array for full wavelength coverage. The detector is thinned and back illuminated for enhanced Quantum Efficiency (QE) in the UV. The detector is mounted on a two stage peltier device and cooled to –30°C for low dark current and improved stability in routine operation. With 1.12 million pixels available, the Vista-MPX covers the wavelength range from 175 nm to 785 nm. Any of the 32 000+ wavelengths in the software wavelength database can be selected. With the ability to choose any wavelength, the Vista-MPX features MultiCal, which extends the linear dynamic range of ICP-OES from parts per billion levels to percentage levels. Unlike dual view systems, Vista-MPX with MultiCal provides this linear dynamic range without having to analyze the sample twice. By comparing results at two or more wavelengths MultiCal provides automatic results confirmation.

Modes AutoIntegration allows intense and trace signals to be measured simultaneously at the optimum Signal to Background Ratio (SBR). Vista automatically allocates an integration time to each of the selected wavelengths–more intense peaks are allocated shorter integration times and less intense peaks are allocated longer times.

The Vista-MPX covers the 175-785 nm wavelength range. Vista’s wavelength selection flexibility allows minor and major elements to be determined simultaneously in a single measurement without the need for dual viewing or having to re-analyze the samples. Alternative wavelengths can be selected to minimize spectral interferences and as a cross check to increase confidence in the results.

Stray light elimination via baffles and optical design to less than 2.0 ppm effective As signal at 193.696 nm from 10 000 ppm Ca.

The entire Vista simultaneous ICP-OES is computer controlled using Varian’s ICP-Expert system software. Full PC control includes all gas flows (nebulizer gas flow with optional mass flow controller), plasma viewing height (radial) or X-Y torch position (axial), ignition, RF power, safety interlocks and utilities monitoring.

ICP-Expert provides a built in, on-line wavelength database of 32 000+ lines.

The Vista-MPX is only suitable for indoor use under the following categories
(EN 61010-1):
• Installation category II
• Pollution Degree 2
• Safety Class 1
Environmental installation specifications for operation are:
• 0-3030 m (0-10 000 ft) altitude, 10-35 °C, 8-80% relative humidity, non-condensing
Full instrument installation instructions are provided free of charge prior to installation.

Spectrometer must be located under an extraction system that provides a minimum flow of 6 cubic metres per minute (200 cfm) at 16 mm water gauge static pressure. The exhaust must be ducted to an external vent.

Width Depth Height Weight
Unpacked 1375 mm 720 mm 992 mm 226 kg
54.5” 28.5” 39” 500 lb
Packed 1660 mm 960 mm 1420 mm 325 kg
65.5” 37.8” 56” 716.5 lb

Water treatment Vista is supplied with in-built water filtration for water supply from a water cooler.

Required Supply Voltage Nominal Rating
Instrument
208, 220, 240 VAC, ±10% 5.1 kVA
230 VAC +14% -6 %
230 VAC +6 % -14%
Frequency 50 or 60 Hz ± 1 Hz
Water cooler
220-240 VAC, 50 Hz 2400 VA
115/230 VAC, 60 Hz 2100 VA
(Typical)
SPS-5 Autosampler
100, 120, 220, 240 VAC +10% 80 VA
230 VAC +14% -6%
Frequency 49-61 Hz
VGA-77P 100, 120, 220, 240 VAC, +10% 24 VA
230 VAC +14% -6%
Frequency 49-61 Hz
Personal Computer
115, 120, 220, 240 VAC 50/60 Hz 300 VA
(Typical)
Laser Printer
115, 120, 220, 240 VAC, 50/60 Hz 85 VA
(Typical)