A microwave plasma atomic emission spectrometry and system for directly analyzing solid samples
A technology of microwave plasma and data analysis system, applied in the field of plasma atomic emission spectrometer, can solve problems such as increasing the complexity of the device, and achieve the effects of shortening detection time, simple device and easy operation
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Embodiment 1
[0073] Embodiment 1 Microwave plasma spectrometer of the present invention
[0074] figure 1 Implementing device for direct analysis of solid samples based on microwave plasma. The implementing device is composed of a microwave plasma system, a gas transmission system, a sample carrying system, a signal collection system, and a data analysis system. The microwave plasma system includes a microwave power source 7, a coaxial cable 9, and a microwave cavity 6. The coaxial cable 9 connects the microwave cavity 6 and the interface 8 on the microwave power source 7 to realize the transmission of microwave energy. The gas discharge tube 5 used is a quartz tube with an inner diameter of 1 mm, an outer diameter of 6 mm, and a length of 200 mm. The gas transmission system consists of a gas cylinder 1, a pressure gauge 2, a mass flow controller 3, and a gas pipeline 4, which can provide a working gas with a speed of 0-1L / min for the plasma system. In this example, the working gas is ar...
Embodiment 2
[0076] Embodiment 2 The microwave plasma spectrometer of the present invention detects the element type and content in the standard product
[0077] Specifically, the job analysis conditions in this implementation case are as follows:
[0078] (1) Sample preparation: Take 0.8g standard soil sample (GSS-2, GSS-3, GSS-4, GSS-5, GSS-6, GSS-7, GSS-14) or CuSO 4 , Pb(NO 3 ) 2 , CrCl 3 Analytical pure, maintained at 4MPa pressure for 2min, made into discs of samples to be analyzed with a diameter of 13mm and a thickness of 2mm, and placed in a desiccator for testing.
[0079] (2) The microwave plasma system is used to directly detect and analyze the samples.
[0080] The plasma working gas used is argon with a purity of 99.999%, the gas flow rate is set to 200mL / min, the microwave power source outputs 2450MHz microwave in the form of continuous wave, and the output power is set to 120W; the coaxial cable is 50 Ω impedance Matching coaxial cables; the microwave cavity is a Surfa...
Embodiment 3
[0086] Embodiment 3 Verification of the method of the present invention——test element content in GBW07408 (GSS-8) sample
[0087] (1) sample preparation
[0088] Take 0.8g GBW07408 (GSS-8) sample, maintain it under 4MPa pressure for 2min, make a disc of the sample to be analyzed with a diameter of 13mm and a thickness of 2mm, and place it in a desiccator for testing.
[0089] (2) Using microwave plasma system to directly detect and analyze samples
[0090] The plasma working gas used is argon with a purity of 99.999%, the gas flow rate is set to 200mL / min, the microwave power source outputs 2450MHz microwave in the form of continuous wave, and the output power is set to 120W; the coaxial cable is 50Ω impedance matching Coaxial cable; the microwave cavity is a Surfatron cavity based on surface waves; the sample stage is three-dimensionally adjustable, which can easily adjust the test position of the sample and the relative height between the sample and the plasma; the signal col...
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