How do Immunodiagnostics work?
Immunodiagnostic platforms exploit the specific binding of an antibody to its antigen. In a sandwich assay, a capture antibody on a solid phase such as a magnetic microparticle or microplate binds the analyte, and a labeled detection antibody forms a complex whose signal is proportional to concentration. In competitive assays, labeled and sample antigens compete for limited antibody sites and signal falls as concentration rises. Labels include enzymes such as horseradish peroxidase or alkaline phosphatase, acridinium esters or ruthenium complexes for luminescence, and lanthanide chelates or fluorophores. After incubation and washing to remove unbound label, a photomultiplier, fluorometer or photometer measures the signal, and a calibration curve converts it to concentration. Automation handles pipetting, incubation, washing and result calculation.
Which Immunodiagnostics variants are available?
- Fully Automated Chemiluminescence Immunoassay Analyzer — A fully automated chemiluminescence immunoassay analyzer uses magnetic microparticles and acridinium or enzyme-triggered light emission to quantify hormones, tumor markers and infectious disease markers with random access.
- Electrochemiluminescence Immunoassay Analyzer — An electrochemiluminescence immunoassay analyzer generates light from ruthenium-labeled complexes at an electrode surface, allowing very sensitive measurement of hormones, tumor markers, cardiac markers and infectious disease markers.
- Time-Resolved Fluorescence Immunoassay Analyzer — A time-resolved fluorescence immunoassay analyzer uses lanthanide chelate labels, such as europium, whose long-lived fluorescence is measured after background decay.
- Dry Fluorescence Immunoassay Quantitative Analyzer — A dry fluorescence immunoassay quantitative analyzer reads single-use cartridges or strips labeled with fluorescent particles to quantify markers such as troponin, CRP and D-dimer in minutes.
- Automated ELISA Processing System — An automated ELISA processing system performs sample pipetting, incubation, washing, substrate addition and absorbance reading on microplates without operator intervention.
How do I choose the right variant?
Match the platform to menu and volume. Chemiluminescence and electrochemiluminescence systems offer wide dynamic range and high sensitivity for hormones, tumor markers and infectious disease serology at medium to high volume. Time-resolved fluorescence suits low-concentration analytes such as newborn screening and fertility hormones. Dry fluorescence readers with cartridges serve small laboratories and emergency testing for cardiac markers. ELISA remains flexible and economical for batch testing and blood screening. Compare reagent menu, closed or open status, onboard reagent stability, sample volume, calibration interval, throughput in tests per hour, and LIS connectivity. Confirm reagent registration in your market, supply reliability and cost per reportable result.
Where are Immunodiagnostics used?
Immunodiagnostics are specified in infectious disease serology screening, thyroid and reproductive hormone testing, tumor marker monitoring, cardiac marker testing and blood bank donor screening.
Which standards and certifications apply?
Work with Immunodiagnostics is commonly governed by ISO 15189, IEC 61010-2-101, ISO 18113-1, CLSI EP05, CLSI EP07, CLSI EP17, CLSI I/LA23 and ISO 13485. Instrument certifications such as CE marking are confirmed per configuration and never assumed.
What are the key considerations before purchase?
Place analyzers on a stable bench with temperature and humidity within the stated range, away from direct sunlight, and provide purified water, waste drainage and stable power where required. Follow maintenance schedules for washing systems, probes and optics, and run daily controls at several levels. Verify new lots and calibration according to laboratory procedures, and monitor for interferences such as biotin, heterophilic antibodies or the hook effect. Store reagents at 2–8 °C and observe onboard stability. Handle specimens as potentially infectious, dispose of liquid waste according to biosafety rules, and document maintenance, calibration and operator competence under ISO 15189. Plan service coverage and reagent logistics for the market.
