Inductively Coupled Plasma Mass SpectrometerICP-MS ionizes the sample through inductively coupled plasma (ICP), and then separates and detects the ions using mass spectrometry (MS) to achieve accurate determination of element types and contents.

　　Inductively Coupled Plasma Mass SpectrometerThe workflow can be broken down into five key steps: sample introduction → plasma ionization → ion transport → mass analysis → detection and counting. The core is to achieve element analysis through "plasma generated ions+mass spectrometry screening and detection":

1. Sample introduction: Liquid samples (such as digested water samples or food extracts) are converted into aerosols through atomizers and brought into the plasma torch by a carrier gas (usually argon); Solid samples need to be converted into liquids through pre-treatment such as microwave digestion and acid dissolution.

2. Plasma ionization: Sample aerosols enter inductively coupled plasma (ICP) - a high-temperature plasma torch formed by high-frequency current exciting argon gas. During this process, sample molecules are completely dissociated and elemental atoms are ionized into positively charged ions.

3. Ion transport: Ions in the plasma enter the vacuum system through a sampling cone, and after being screened by a cutting cone, they are focused into an ion beam by an ion lens to remove neutral particles and photon interference, and then enter the mass analyzer.

4. Quality analysis: The core component is a quadrupole mass analyzer, and some aircraft models use time-of-flight (TOF) or fan-shaped magnetic field analyzers. The quadrupole allows only ions with specific mass to charge ratios to pass through by adjusting the RF voltage, achieving the screening of different elements.

5. Detection and counting: The ions passing through reach the detector (such as an electron multiplier), and the ion signal is converted into an electrical signal. After amplification and data processing, the ion concentration is reflected by the "counting rate", and finally converted into the actual content of elements in the sample through a standard curve.