Microwave Plasma Atomic Emission Spectrometry (MP AES)

Microwave Plasma Atomic Emission Spectrometry (MP AES)

MP-AES is a high sensitivity atomic emission spectrometer.
It utilizes microwave plasma and runs on air (Nitrogen) instead of combustible gases; it can be installed in either a centralized laboratory or a remote location.
The technique showed much promise for routine analytical application with several advantages such as: smaller footprint, multi-element capability, relatively inexpensive and good detection power and speed.

Technical specifications:
Multi-purpose sample introduction system
OneNeb nebulizer
A glass cyclonic double pass spray chamber
Humidifier for the nebulizer gas line
Fully PC-controlled 5 channel peristaltic pump with variable speed from 0–80 rpm

Plasma configuration:
Vertically oriented plasma for improved matrix handling with end-on or axial viewing for optimum sensitivity and best detection limits

Computer-controlled plasma viewing position which may be optimized for each wavelength.
A pre-optics protection gas flow of compressed air (25 L/min)
An operator replaceable pre-optics window
Instrument interlocks
Pre-optics window
Torch loader
Plasma enable switch
Gas supply pressures for nitrogen, argon and air
Pre-optics window temperature
Operating temperature for HV power supply, magnetron and microwave excitation assembly
Plasma status

Optical system:
Fast-scanning, high-resolution optical system for fast measurement using a compact design
Czerny-Turner design monochromator with 600 mm focal length and fixed entrance slit for ease of operation
Holographic diffraction grating with 2400 lines/mm is blazed at 250 nm for optimum UV performance
Wavelength range 178–780 nm
The optical system can be purged with air for protection in dusty or corrosive environments, or nitrogen at 10 L/min for sulfur determinations

Detector:
Hermetically-sealed, UV-sensitive, back-thinned solid state CCD detector (532 x 128 pixels) designed especially for low-light level detection with > 90% quantum efficiency at peak sensitivity
A thermoelectric Peltier cooler device for low dark current and reduced baseline noise
High dynamic range and blooming resistance

Signal stability:
< 2% RSD over 2 hours without internal standardization or any form of drift correction

Resolution:
0.050 nm (measured as full width at half maximum)

Detection limits:
3 sigma detection limits (µg/L) using a 10 second integration time

Wave length calibration solution:
500 ml solution containing: 5 mg/l Al, As, Ba, Cd, Co, Cr, Cu, Mn, Mo, Ni, Pb, Se, Sr, Zn and 50 mg/l K in 5 % HNO3 + tr HF.

Autosampler:
User programmable in X, Z, and Theta (rotational) dimensions. Optimized sample-to-sample probe movement time for corner to corner

Probe arm speed:
Axis        Minimum speed    Maximum speed
X (mm/sec)    14.5    1016
Z (mm/sec)    8.6    518
Theta (degrees/sec)    9    540

Rinse port flow rate:
Programmable, up to 50 mL/min depending on pump tube diameter
Communication
USB 2.0 (full speed) virtual com port with plug-and-play capability
AUX interface
RS485 for future upgradability to external device control
Power requirements
220 ±10 V, 50-60 Hz
Built-in diagnostics
Shall include a row of LEDs on the front panel that indicate the operational or error status of the instrument
Nitrogen generator

General Features:
Complete ‘Plug and Play’ system  specifically designed for MP-AES
N2 : 25 L/min at 65 psi, @ 99.5% Dry Air : 36.5 L/min at 87 psi separate in 3 way for POP, EGCM and monochromator gas
Ambient Temp range:  5-35°C (41-95°F)
Maximum air Inlet Pressure:  8.5 bar  
Electrical Supply 220vAC / 50-60Hz
Integral oil free air compressor and noise reduction  technology  
Auto start
Alarm display with help menu
Audible alarm sounder
Outlet flow indicator
Trend graphs for QA reporting
Energy saving Mode
Compressor over temperature alarm
N2 – Avg. 25 L/min
POP gas air  -- Avg. 1.5 L/min
Monochromator purge gas -- Avg. Air 10 L/min
Purity N2 -- > 99.5%
Outlet pressure – clean and dry
Integral air compressor – yes

Accessories:
Torches
Easy-?t torch for supplied instrument – 3pcs
Nebulizers
Inert OneNeb concentric nebulizer with easy fit connector for nitrogen gas – 1pc

Pump tubes
Fared ends, for organics and high TDS aqueous samples, Solva?ex, orange/green – 24pcs
MSIS – 1pc

Argon gas
99.995 % purity with complete accessories like cylinder and regulator

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