ICP-7700 Inductively Coupled Plasma Optical Emission Spectrometer

 
ICP-7700 Inductively Coupled Plasma Optical Emission Spectrometer
 
 
一、Main unit
 
1.1Plasma excitation and impedance matching using automatic technology, low reflected power, standing-wave ratio (SWR) is less than 1.25.
 
1.2  Axial viewing position, longer torch is used to reduce the fluctuation of the tail flame, the cold cone is placed at the tail flame to prevent the tail flame from entering the viewing hole.
 
1.3  Argon Flows: MFC on nebulizer gas, plasma gas, auxiliary gas. All gas flows under computer control.
 
1.4  Work coil has a mall inner diamete, high energy conversion efficiency
 
(1000W), and when the carrier gas flow is 0.7L/min, the robustness is
 
greater than 9.
 
1.5    One wavelength scan is performed before sample measurement, which can avoid wavelength shift after long-term measurement to affect measurement accuracy.
 
1.6  Upgraded spectrum database, data information up to 50,000.
 
1.7  Interference spectral line automatic filter function
 
1.8  Automatic serial communication
 
1.9  Analysis speed: The fastest speed is more than 5 elements per min.
 
1.10  Scan range：190~500nm
 
1.11   Scanning mode: Turbo vortex rod, driven by computer-controlled stepper motor, minimum scan step is 0.0006nm.
 
1.12  Wavelength error≤0.005nm
 
1.13  Repeatability：≤0.005nm
 
1.14  Correlation coefficient：≥0.9995

 
1.15  Precision:RSD≤1.0%
 
1.16  Stability: RSD≤2.0%
 
1.17  Measuring range：Ultramicro to constant quantity
 
1.18  Detection limits：
 
Zn≤0.003mg/L
 
Ni ≤0.010mg/L
 
Mn ≤0.002mg/L
 
Cr ≤0.007mg/L
 
Cu ≤0.007mg/L
 
Ba≤0.001mg/L
 
1.19   Measurement method：sequential measurement of single element or multielement
 
1.20  Power：2.5KW(maximum power)
 
二、Detailed parameters
 
1、Radio Frequency Generator (RF)
 
1.1  Electric Circuit: Solid state device,unself-excited
 
1.2  Frequency：27.12MHz
 
1.3  Frequency Stability：<0.01％
 
1.4  Output Power：700 W-1200W， in 50W increments
 
1.5  Output Power Stability：≤0.1％
 
1.6  Electromagnetism Leakage Intensity：<2V／m
 
2、Sampling introduction
 
2.1  Output Work coil: ID 25mm, 3 turns.
 
2.2  Torch：3-concentric quartz torch
 
2.3  Coaxial nebulizer: Concentric nebulizer
 
2.4  Spray Chamber: Double barrel cyclonic spray chamber, removes large droplets furtherly and improves aerosol atomization efficiency

 
2.5  viewing position: axial
 
2.6  Argon Flow:
 
2.6.1 Plasma gas: mass flow meter, 0-20L/min, accuracy ±0.4L/min, stability ±0.2L/min
 
2.6.2Auxiliary gas: 0-2 L/min, accuracy ±0.04L/min, stability ±0.02L/min 2.6.3 Nebulizer gas: 0-2 L/min, accuracy ±0.04L/min, stability ±0.02L/min 3、Optical System
 
3.1  Optical Path：Czerny—Turner monochromator
 
3.2 Focal length: 750mm
 
3.3Grating: Ion etching holographic grating, 3600 lines／mm,
 
80×110mm
 
3.4Reciprocal of Linear Dispersion Ratio：0.37nm/mm 3.5Resolution：≤0.015nm
 
3.6 Wavelength range: 195nm—500nm
 
3.7Minimum Step of Stepping Motor Drive：0 0006nm 3.8Exit and incident slit：20um 3.9Reflector：(78×105×16)mm
 
3.10Lens: Φ30，1:1 imaging
 
3.11Splitter Thermostat：30-38︒C adjustable 4、Detector
 
4.1Photomultiplier Tube：CR316-01
 
4.2Photomultiplier Tube Voltage：200 V—1000V, Stability <0.05% 4.3Current Measure Range of Photomultiplier Tube：10^-4～10^-9 A

4.4Signal Acquisition: V/F
5. Instrument configurations
5.1ICP-7700 main unit	1
5.2 Software Installation CD and Operating Manual	1