A kind of dbd excitation source, dbd-aes system and detection analysis method thereof
A technology of excitation source and power supply system, applied in the direction of electrical excitation analysis, material excitation analysis, etc., can solve the problems of low sensitivity, slow analysis speed, and the detection limit of the elements to be detected cannot reach the daily detection, and achieve high detection frequency, The injection flow rate is fast, the effect of solving residues and multiple excitations
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Embodiment 1
[0048] A DBD excitation source such as figure 1 , 2 , 3 and 4, it is an open plasma excitation source, which is composed of electrode one 1, electrode two 2 and power supply system 3, electrode one 1 is a conductive metal sheet (tungsten sheet) 5 attached to the quartz sheet 4, and the electrode Two 2 consists of an atomizer 6 and a metal foil (aluminum foil) 7 wrapped on the side wall of the atomizer outlet 13, the gold foil can also be a tungsten or platinum foil, and the atomizer outlet 13 is perpendicular to the electrode one 1 , a discharge area 18 is formed between the electrode one 1 and the atomizer outlet 13, and the two electrodes are respectively connected to the two poles of the power supply system 3 through wires 8;
[0049] Wherein, a wire 8 is connected on the platinum sheet 5 of the electrode one 1, and another wire 8 is wound outside the metal foil (aluminum foil) 7 of the electrode two 2;
[0050]Described atomizer 6 is the sleeve pipe that is made up of in...
Embodiment 2
[0057] A DBD excitation source, the structure is the same as that of Embodiment 1, the difference is that the conductive metal sheet 5 of electrode one 1 is a platinum sheet; the metal foil sheet 7 wrapped on the side wall of the atomizer outlet by electrode two 2 is a gold foil sheet;
[0058] The thickness of the outer wall of the atomizer 6 is 0.1-0.4 mm; the inner diameter of the sample outlet 12 is 0.3-0.6 mm, the inner diameter of the carrier gas outlet 11 is 0.6-0.9 mm; the thickness of the gold foil 7 is 0.01-0.5 mm;
[0059] The distance between the atomizer outlet 13 and the first electrode is 0.2-1000 mm.
Embodiment 3
[0061] A DBD-AES system such as Figure 4 and Figure 5 As shown, by the DBD excitation source among the embodiment 1, sequential injection system 15, carrier gas bottle 16 and CCD (Charge-Coupled Device, charge-coupled device) detector 17 are made up;
[0062] Wherein, the sequential injection system 15 is connected with the sample inlet 10 of the DBD excitation source nebulizer 6, and is used for inputting the liquid sample into the nebulizer 6;
[0063] The carrier gas cylinder 16 is connected to the carrier gas inlet 11 for inputting the carrier gas into the nebulizer 6;
[0064] The CCD detector 17 is located on the side of the electrode discharge area 18, and is used to observe the emission spectrum signal of the object to be measured;
[0065] The carrier gas flow rate of the above system within the detectable range is 0-800mL / min; the liquid flow rate is 0-120μL / s; the sampling frequency is 0-80 times / h.
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