styrlösningar

Styrlösningar, literally “control solutions” in Swedish, are prepared chemical solutions with precisely known compositions and properties used to verify and regulate the performance of analytical instruments, assays, and measurement procedures. They function as reference materials that enable laboratories and industries to monitor accuracy, precision, linearity, and stability of their methods.

Two main categories exist: calibration standards, which establish the instrument response to known concentrations, and quality-control materials, which monitor ongoing performance. They may be single-analyte or multi-analyte and are typically supplied with a certificate of analysis or a traceability statement.

Preparation and characteristics: styrlösningar are produced from primary standards or certified reference materials and are traceable to national or international standards. They have defined storage conditions and shelf life, may be liquid or dry and require reconstitution, and are usually packaged in ampoules or sealed vials to preserve stability.

Applications span clinical chemistry, environmental analysis, food safety, pharmaceuticals, and industrial process control. They are used to calibrate spectrophotometers, chromatographs, pH meters, conductivity meters, and mass spectrometers, among others.

In quality management, styrlösningar support accuracy checks, method validation, and proficiency testing. They are integrated into calibration schedules and control charts and are commonly referenced in accreditation standards such as ISO 17025 and ISO 15189. Safety and disposal follows standard material safety data sheet guidance, with handling and storage procedures designed to minimize degradation and contamination.