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HomeFinanceTradeOre, Coal, Biofuels, Steel & FertilizersCommercial AnalysisSample Reduction
Sample reduction (crushing, splitting and screening) are the steps that typically occur after sample drying. The professionals in our laboratories are skilled in these procedures. They provide you with sub-samples that are free of contamination and properly prepared for analysis.
SGS laboratory staff most commonly use a jaw crusher as the primary crushing tool. These crushers can accommodate chunks up to 15 cm and can reduce them in size until 80% of the sample passes through a 2 mm screen. Staff then use ring and puck mills to prepare a smaller particle size if required for sample pulverizing. Organic samples can be reduced in size with a macerating hammer mill. This makes organic material easier to homogenize and makes representative sub-sampling easier.
Sample crushing services available through our laboratories include:
After crushing, SGS laboratory staff sub-sample the sample to create a portion for pulverizing. This may require splitting. Our staff follow industry standard practices to ensure that your sub-samples are representative of the primary sample. Duplicate splits are scrutinized to be sure that they are crushed to a suitably small sample size before splitting.
SGS sample splitting services include:
Sample screening is one further sample preparation procedure offered by SGS. Sample screening services include:
SGS’s rigorous sample crushing, splitting and screening methods ensure that results of your analyses are truly representative of the sample. Go to sample preparation for a complete description of our services.