An analysis power supply, mineral powder analysis device and method

Abstract

The invention relates to a high-power plasma analysis power source. The analysis power source comprises a power source, a magnetic resistor, a magnetic resistor driver, a pulse generator and a control unit. The power source supplies current to the magnetic resistor. The magnetic resistor is provided with an output end. The magnetic resistor driver controls the electrical inductance of the magnetic resistor. The pulse generator outputs high-voltage pulses. The control unit controls the power source, the magnetic resistor, the magnetic resistor driver and the pulse generator to work. The invention further discloses a mineral powder analysis device and method. The analysis power source and the mineral powder analysis device and method have the advantages of being high in reliability, stability, repeatability, wide in control range and the like.

Description

technical field [0001] The invention relates to an analysis power supply, an analysis device and a method, in particular to a high-power plasma analysis power supply, a mineral powder analysis device and a method. Background technique [0002] There are currently two types of instruments on the market for high-precision spectral analysis of minerals, one is ICP-OES or ICP-MS using chemical analysis methods, and the other is a direct-reading spectrometer that ionizes mineral powder. [0003] Among them, ICP-OES or ICP-MS using chemical analysis methods requires a series of pretreatment processes such as sampling and digestion of solid mineral samples to convert mineral samples into sample forms that can be detected by ICP-OES or ICP-MS. This method can realize mineral detection, but it takes a long time to prepare samples, and it is only suitable for weakly acidic substances, not for alkaline substances; at the same time, the detection limit of some elements is not high, and ...

AI Technical Summary

Problems solved by technology

[0008] 1. Poor stability

[0009] Since the freewheeling characteristic of the thyristor is used to realize the supply of large current, it is difficult to ensure the stable supply of high voltage and large current under the influence of external mains power supply;

[0010] 2. Unable to realize intelligent control

[0011] The intelligent and fine control of the large current provided by the thyristor cannot be realized, so that the mineral sample cannot achieve optimal plasmaization;

[0012] 3. Huge volume and low energy efficiency

[0013] Thyristor and power control are bulky, heavy, and low in detection efficiency;

[0014] 4. Poor reliability and safety

[0015] Mechanical switching in high-voltage relays is prone to damage, resulting in contact bonding, which makes the reliability and safety of the analytical instrument poor;

[0016] Using high-voltage diodes in series to achieve high voltage, the cost is high, and at the same time limited by high-voltage semiconductor devices, its reverse recovery time is long and energy loss is large

[0017] 5. Current working range is limited

[0018] The current working range is limited. On the one hand, due to the limitation of high-voltage relays and other devices, the current can only work below 20A; on the other hand, the working current of high-voltage diodes must be within 30A

[0019] In summary, the existing mineral powder analyzers on the market do not conform to the trend of high-precision, smart, stable and easy-to-use instruments.

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