Sample handling preservation

A sample subdivided in the field and preserved separately should be used whenever possible, to assess the variability of sample handling, preservation, and storage along with the variability of the analysis process. If the nature of the matrix, the sample acquisition procedure, or the analytical technique prevents the assessment of the entire measurement system, the replicate samples used to assess precision should be selected to incorporate as much of the measurement system as possible. 

There are marry sources of variability related to the sampling, handling, transfer, and preservation of samples. The preparation, sampling, and analysis of animal feeds deserve special attention. 

B3 Sample handling and custody 3.2 Sample custody and tracking 3.3 Sample preservation techniques 3.4 Sample packaging and shipment 3.8 Equipment decontamination... 

Summary statement on the observance of sample handling requirements (holding time container preservation trip and equipment blanks) with exceptions interpreted in context of the contaminant of concern... 

Sample collection Equipment Sample handling and preservation Sample containers... 

The error incurred when the integrity of the sample is not preserved, commonly known as sample handling. 

Oxidation, abrasion, and evaporation are examples of improper sample handling because the sample integrity is not preserved. Getting a representative sample is useless if the value of the property of interest changes during transport. Then it is no longer representative. 

It is emphasised that the CRM 403 is a seawater sample that has already been treated (filtration, acidification) to enable storage. Hence, analytical results obtained that match the certified values do not give information on the sample handling prior to the chemical analysis. The handling, e.g. sampling, filtration, acidification, storage etc. of real samples should be performed with the necessary care to preserve their original state. 

Speciation Overview Waters, Sediments, and Soils. Environmental Analysis. Extraction Solid-Phase Extraction. Food and Nutritional Analysis Overview. Geochemistry Soil, Minor Inorganic Components. Ion Exchange Overview. Isotope Dilution Analysis. Liquid Chromatography Overview. Polarography Overview. Sample Handling Sample Preservation. Voltammetry Overview. Water Analysis Industrial Effluents. X-Ray Absorption and Diffraction X-Ray Absorption. 

Overview. Polychlorinated Biphenyls. Polycyclic Aromatic Hydrocarbons Determination. Polymers Natural Rubber Synthetic Polyurethanes. Quality Assurance Quality Control Instrument Calibration Interlaboratory Studies Reference Materials Production of Reference Materials Method Validation Accreditation Clinical Applications Water Applications. Sample Handling Comminution of Samples Sample Preservation Automated Sample Preparation Robotics. Sampling Theory Practice. Solvents. Supercritical Fluid Chromatography Overview Applications. Vitamins Overview Fat-Soluble. 

See also Air Analysis Sampling. Chromatography Overview Principles. Clinical Analysis Sample Handling. Drug Metabolism Metabolite Isolation and Identification. Extraction Solid-Phase Extraction. Food and Nutritional Analysis Sample Preparation. Forensic Sciences Volatile Substances. Headspace Analysis Purge and Trap. Perfumes. Sample Handling Sample Preservation Automated Sample Preparation. Sampling Theory. 

Spectrometry Overview. Mercury. Microscopy Techniques Scanning Electron Microscopy X-Ray Microscopy. Particle Size Analysis. Polychlorinated Biphenyls. Polycyclic Aromatic Hydrocarbons Environmental Aj li-cations. Radiochemical Methods Overview. Sample Handling Sample Preservation. Sampling Theory. Surface Analysis Auger Electron Spectroscopy. Tin. X-Ray Absorption and Diffraction Overview. X-Ray Fluorescence and Emission Energy Dispersive X-Ray Ruores-cence Particle-Induced X-Ray Emission. 

To ensure consistency and efficiency, sample handling (filtration, decantation, centrifugation, sample splitting, etc.), preservation, storage, and transportation procedures must be properly and accurately documented, and adhered to by field personnel. 

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