Application of High-Voltage Power Supply in Inductively Coupled Plasma Technology for Elemental Analysis Instruments
Elemental analysis is a core technical means in many fields such as materials science and clinical testing. Traditional elemental analysis techniques like spectroscopic analysis have the limitations of low sensitivity and poor detection limits. Inductively coupled plasma technology utilizes the ionization and excitation effects of high-temperature plasma to effectively improve the detection limits of elemental analysis. The application of high-voltage power supply has brought major breakthroughs to this technology.
Inductively coupled plasma requires a high-frequency electromagnetic field to excite the working gas to generate plasma. And producing a strong magnetic field requires a high-voltage power supply to provide stable and controllable DC power to the loading coil. The closed-loop controlled high-voltage power supply can output a precise and stable DC voltage above 1000V, meeting the needs for magnetic field strength. The high-voltage power supply has over-current and over-voltage protection to ensure safe and reliable operation of the device.
After the DC output from the high-voltage power supply is converted into 13.56MHz radio frequency energy by the RF generator, this RF current excites a strong magnetic field in the loading coil, which captures working gases like argon and ionizes them. Under the magnetic field, the plasma rotates in a spiral, greatly increasing the electron density, which benefits spectroscopic analysis. The high-voltage power supply provides a stable energy source for the entire excitation process.
In the plasma, the ionized sample emits a characteristic atomic emission spectrum. By analyzing the emission spectrum, the elemental composition and content information of the sample can be obtained. Compared to traditional methods, inductively coupled plasma technology improves sensitivity by 10-100 times, with detection limits as low as ppb levels, and faster testing speed. Combined with mass spectrometry, simultaneous multi-element detection can be achieved.
This technology is applied in fields such as environmental monitoring and industrial quality inspection. It can perform elemental analysis of liquid, solid, and deposit samples, and can also prepare high-purity gaseous and dissolved standard reference materials. With the application of high-voltage power supplies, inductively coupled plasma analyzers have become an accurate and efficient modern elemental analysis tool. As high-voltage power supply control technology continues to improve, it will promote the application scope of this technology and the development of elemental analysis towards higher precision.