Inorganic Certified Reference Materials
Novachem distributes inorganic certified reference materials (CRM), reference materials (RM) and setting up samples (SUS) for industrial testing labs in Australia and New Zealand. We bring together from a wide variety of sources. These include
- VHG brand of high-purity single, multi-element and custom blended petroleum, aqueous and solid analytical reference materials and calibration standards,
- VHG consumables and supplies for ICP, ICP-MS, AA, GFAA and XRF instruments;
- ARMI range of metal alloy reference materials and a PT program unique in the metals industry;
- Breitlander’s extensive range of metal CRM and high-quality sample preparation equipment.
Most products are supplied with certificates of analysis, although the layout and format of the certificates will vary according to the producer.
Setting-up samples come with information sheets only.
Use of quality reference materials helps produce reliable analytical measurements and quality data, which ensures proper decision making going forward. When choosing a matrix reference material for a particular application, the analyst should consider the following factors before selecting the material:
- Matrix match and potential interferences
- Quantitation range
- Measurement uncertainties
- Producer certification procedures
- Material documentation (e.g. certificate or report)
Certified Reference Material (CRM)
A CRM is accompanied by a certificate with one or more property values certified by a procedure which establishes its traceability to an accurate realization of the unit in which the property values are expressed. Each certified value is also accompanied by an uncertainty at a stated level of confidence. CRMs are certified by a recognized certifying organization using approved certification procedures as outlined in ISO Guide 35:2006, “Reference Materials-General and Statistical Principles for Certification.” A CRM is an analytical reference material that is elevated to the highest order possible due to its traceability to SI units, and to the attributed confidence in the producing company or organization
Reference Material (RM)
An RM is a material or substance with one or more property values sufficiently homogeneous and well established to be used to calibrate an apparatus, for the assessment of a measurement method, or for assigning material values. Interlaboratory testing is applied to RMs using many analysts, and RMs are then supplied with certificates of analysis. Testing does not usually follow all ISO Guide 35 certification guidelines. RM certificates often state that measurement data is traceable to primary CRMs.
Setting-Up Samples (SUS)
SUS materials should have minimal inhomogeneity, and are used to monitor or adjust lab instrument analytical signals. Instrument calibration is conducted using CRMs, RMs and SUS samples, at which time values are assigned to the SUS materials. As a result, SUS materials do not have certified analyses, but are assigned approximate values only. SUS standards are also referred to as “recalibration samples”, “drift control samples” and “monitor samples.”