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  • X-Ray Photoelectron Spectroscopy (XPS) Testing

    X-ray photoelectron spectroscopy (XPS) is the use of X-rays to irradiate the sample to stimulate the emission of inner electrons or valence electrons of atoms or molecules. XPS is an important method of material surface analysis, and widely used in the analysis of inorganic elements in the fields of chemistry, polymer, materials, environment, biology, medicine, pharmacy, agronomy, geology, food, life science, etc. As a professional reliability third-party testing organization, T,C&A Lab's XPS Testing Laboratory can perform a full range of analysis services according to ISO, ASTM and other standards as well as industry requirements. Welcome to contact our experts for consultation.

    Analysis and testing capabilities of XPS

    • Qualitative analysis of elements

    All elements except H and He can be identified based on the positions of the characteristic lines appearing in the energy spectrum.

    • Quantitative analysis of elements

    According to the energy spectrum, the photoelectron line intensity (the area of the photoelectron peak) reflects the content or relative concentration of atoms.

    • Solid surface analysis

    Including surface chemical composition or element composition, atomic valence state, surface energy state distribution, measurement of electron cloud distribution and energy level structure of surface electrons, etc.

    • The structure of compound

    It can accurately measure the chemical shift of the inner electron binding energy and provide information on the chemical bond and charge distribution.

    • Application in molecular biology

    For example, using XPS to identify a small amount of Co in vitamin B12.

    Applicable fields

    • It is used to measure the chemical composition and chemical state of the surface

    • In-depth analysis

    • Micro-area qualitative and semi-quantitative analysis

    • Surface chemical image

    Sample requirements

    • Powder samples: dry powder samples that need more than 10mg.

    • Solid sample: the length of either side is not more than 1cm and the thickness does not exceed 2mm.

    • Liquid sample: easy to dry, charge for sample preparation.

    • Note: Mark whether the sample has information such as magnetism, toxicity, volatility, corrosivity, radioactivity, etc.

    Standards we test to

    ASTM E995Standard Guide for Background Subtraction Techniques in Auger Electron Spectroscopy and X-Ray Photoelectron Spectroscopy
    ASTM E1523Standard Guide to Charge Control and Charge Referencing Techniques in X-Ray Photoelectron Spectroscopy
    ASTM E2108Standard Practice for Calibration of the Electron Binding-Energy Scale of an X-Ray Photoelectron Spectrometer
    ISO 1966Surface Chemical Analysis — X-Ray Photoelectron Spectroscopy — Estimating and Reporting Detection Limits for Elements in Homogeneous Materials
    ISO 16531Surface Chemical Analysis — Depth Profiling — Methods for Ion Beam Alignment and the Associated Measurement of Current or Current Density for Depth Profiling in AES and XPS

    In addition, the experts in our XPS Testing Laboratory also provide a variety of custom services as your needs and requirements. Let's discuss the custom services with our experts for free.

    Instruments and data

    XPS 1
    XPS 2
    XPS 3


    1. Kumagai, R.; et al. Light-induced atom desorption from glass surfaces characterized by X-ray photoelectron spectroscopy[J]. Applied Physics B Lasers & Optics, 2016.
    2. Jain, M.; et al. Defect states and kinetic parameter analysis of ZnAl2O4 nanocrystals by X-ray photoelectron spectroscopy and thermoluminescence[J]. Scientific Reports, 2020, 10(1):385.

    Note: this service is for Research Use Only and Not intended for clinical use.


    T,C & A LAB is an independent lab providing quality or custom testing, characterization and analysis of a variety of materials. Our engaged experts are ready to help you.

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