Shanghai Jingqi Inductively Coupled Plasma Optical Emission Spectrometer JQ-900, Shanghai Jingqi Instrument Co., Ltd. (CAT#: STEM-S-0018-YJL)

Shanghai Jingqi Inductively Coupled Plasma Optical Emission Spectrometer JQ-900, model JQ-900 is manufactured by Shanghai Jingqi Instrument Co., Ltd.

1. Radio Frequency Generator (RF)
(1) Circuit type: self-excited oscillation circuit, automatic ignition, precision high-voltage switching power supply system, all functions are controlled by computer software (ignition, flameout, power and other parameter settings); real-time power control; automatic matching and tuning; constant temperature of the optical chamber
(2) Working frequency: 40.68MHZ±0.05%
(3) Frequency stability: <0.1%
(4) Output power: 700-1600w
(5) Output power stability: ≤0.3%
(6) Radiation intensity of electromagnetic field leakage: 300mm away from the fuselage, electric field intensity E: <2V/m
2. Sampling Device:
(1) Output working coil inner diameter 25mm, 3 turns
(2) Torch: Quartz torch with an outer diameter of 20mm
(3) The outer diameter of the coaxial sprayer is 6mm
(4) The outer diameter of the double cylinder fog is 35mm
(5) Argon gas flow meter specifications and carrier gas pressure gauge specifications:
① Plasma flowmeter (100-1000) L/h; (1.6-16L/min)
② Auxiliary air flow meter (6-60) L/h; (0.1-1L/min)
③ Carrier gas flow meter (6-60) L/h; (0.1-1L/min)
④ Carrier gas regulator valve (0-0.4MPa)
3. Argon secondary regulator valve (0.3MPa) is installed in the instrument
Metering device:
(1) Photomultiplier tube specification: R212UH
(2) Photomultiplier tube negative high voltage: 200-1000V, stability <0.05%
(3) Photomultiplier tube current measurement range: 10-12 -10-4A
(4) Signal acquisition is V/F exchange: 1mV corresponds to 100Hz
Splitter:
(1) Optical path: Czerny-Turner
(2) Focal length: 1000mm
(3) Grating specifications: ion-etched holographic grating, groove density 3600 lines/mm, groove area: 80×110mm, reciprocal of line dispersion rate: 0.26nm
(4) Wavelength range: 190-500nm
(5) Resolution: ≤0.008nm
(6) Scanning wavelength range: 3600 lines/mm Scanning wavelength range: 190-500nm
(7) Minimum step distance driven by stepping motor: 0.0006nm
(8) Entrance slit: 20μm Exit slit: 25μm
(9) Mirror specification: (78 × 105 × 16) mm
(10) Lens ф30, 1:1 imaging
4. Technical Indicators of the Whole Machine:
(1) Measuring wavelength range: 180-500nm 3600L/mm grating
(2) Measurement accuracy (repeatability): average relative standard deviation RSD≤1%
(3) Measurement stability: average relative standard deviation RSD≤2
(4) Lower detection limit: sub-PPb level

The high-voltage power supply circuit of the RF generator adopts advanced electronic technology, eliminates the bulky step-up transformer and high-frequency choke coil, and adopts power closed-loop feedback technology with a control accuracy of less than 0.1%.
Fully automatic ignition, intelligent control of gas path, realizing software ignition, more convenient.
Safe cooling water protection, argon gas protection, overvoltage, overcurrent, and arc extinguishing protection are safer.
The output power is automatically matched and tuned, and the power parameter software program is set.
The spectrometer is filled with argon gas, so that the wavelength of sulfur at 180nm and Sn at 189nm can be measured sensitively.
Excellent optical system and advanced control system ensure accurate peak positioning, excellent signal-to-background ratio and minimal matrix effect.
Wide measurement range, ultra-trace to constant analysis, dynamic linear range of 5-6 orders of magnitude.
The detection limit is low, and the detection limit of most elements can reach ppb level.
Good measurement accuracy, stability relative standard deviation RSD≤1.5% (5ppm), national A-level standard (JJG768-2005).
Argon consumption: 14L/min

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