So how good is your standard? If asked how confident are you that the result you have realised is accurate and can you prove it?
Quantifying the presence or absence of chemicals accurately has become imperative in all aspects of life and the data is only meaningful if it is underpinned by reliable reference materials that validate and verify data
It is essential that analysts ensure that they have documented and traceable analytical procedures supported by Certificates of Analysis to verify this analytical data……..
We are ensuring that all your experimentally measured or realised values are traceable to reliable measurement standards
Certified Guide 34 standards to fully support accredited laboratories to verify and validate their analytical data through the use of a CRM and thereby establish traceability
Ceritificate of Anaysis
ISO Guide 34
ISO Guide 34 Inorganic Standards Certified Reference Materials
Accredited Standards Certified Reference Materials (CRM) are of the very highest quality and are manufactured using ultra high purity acid and 18 megohm doubly deionized water that has been filtered through a 0.2 micron filter. They are suitable for use as calibration test or quality control materials for ICP-AES, OES and MS analysis and packaged in 125ml and 500ml bottles to minimise contamination.
Traceable by NIST Standard Reference Material (SRM)
Why Accredited Standards Matter
1000 & 10,000 µg/ml standards
Comprehensive certification including validation by at least 2 methods
Full 1 year certificate expiry
100% Satisfaction with all standards supplied
Certificate inclusive of 72 element trace impurities measured to µg/ml
Accredited to ISO Guide 34 / Compliant to 31 & 35
99% orders supplied within 24 hours
Compliant and certified to Guide 34 (31 & 35)
100% satisfaction guarantee with all standards supplied Your results are only meaningful if reliable reference materials are used to calibrate your instruments – Accredited Standards (AS) brand are now one of the very few fully compliant manufacturers who are able to offer a range of inorganic standards suitable for all methods with fully comprehensive and compliant Certificates of Analysis giving a 100% satisfaction guarantee to the quality of our products
99% orders supplied within 24 hours Stocks of all our single element standards are managed to assure 24 hour delivery on almost 100% of all orders placed
Full 1 year certificate expiryExpiry date: this refers to the expiry of the certificate. Once the container has been opened, and assuming the analyst has adopted “Good practice in using the reference material” in accordance with the guidelines of ISO Guide 33, the certified value assigned maybe considered as valid the period stated on the certificate. When you use a standard for longer than a year, you are gambling that absolutely nothing has inadvertently affected the chemical components. Shelf life: This is the period of time that the manufacturer may store the product under controlled conditions before the product requires re-certification. This is not the period of certification or stability once delivered to the end user.
As your results have been derived from using a reference standard, what level of confidence do you have that the standard you are using is correct, and how have you confirmed this? ISO Guide 34 "General Requirements for the Competence of Reference Materials Producers" Accredited Standards meet every requirement for the competence in the very specific field of Reference Material Production and have certification to ISO Guide 34. The adoption of reference materials with ISO 17025 Guide 34 compliance assures your laboratory is able to demonstrate traceability between measured results of the measured standard references, and that of the measured sample, allowing your laboratory to achieve measurement targets, saving time and money, and more importantly giving confidence in your analytical data Guide 31 - Contents of certificates and accompanying documentation Accredited Standards documentation provides in summary form all the information needed by the user of the (certified) reference material, and is considered as the most informative in the industry. Guide 35 - Reference materials - General guidance for the assignment of property values In compliance with Guide 35 Accredited Standards approach for the assessment of homogeneity, stability, and the characterisation of reference materials, is well established and goes beyond what is required. Through the calculation of uncertainties of the assigned values by at least two methods and the additional analytical data which provides extended indicative information Accredited Standards are able to demonstrate excellent metrological traceability of assigned values, in addition to confirming they are “fit for purpose”
Accredited Standards have Traceability to NIST Standard Reference Materials (SRM) the detail of which is included on each Certificate of Analysis (COA) where not only the SRM number (required) but also the specific lot number (not required) of the SRM is shown on the Certificate of Analysis. To support a claim, the provider of a measurement result or value of a standard must document the measurement process or system used to establish the claim and provide a description of the chain of comparisons that were used to establish a connection to a particular stated reference. There are several common elements to all valid statements or claims of traceability: • A clearly defined particular quantity that has been measured. • A complete description of the measurement system or working standard used to perform the measurement. • A stated measurement result or value, with a documented uncertainty. • A complete specification of the stated reference at the time that it was compared to the measurement system or working standard. • An 'internal measurement assurance' program for establishing the status of the measurement system or working standard at all times pertinent to the claim of traceability.
Certificate inclusive Certificates of Analysis report a 72 element trace analysis that is performed using both axial view ICP-OES and ICP-MS with the technique having the lowest detection limit and freedom from interference used for the reported value making Accredited Standards one of the few CRM suppliers that reports trace impurities to µg/mL values.
1000 ppm and 10,000 ppm Accredited Standards supply single element standards at concentrations of 1000 ppm (µg/mL) and 10,000 ppm (µg/mL)
Fit for Purpose Accredited Standards have adopted an assured approach in the manufacture and certification of their products. The certified value, with expressed uncertainties, are verified by two independent methods and validated by two independent National Standard CRMs before release of ant product.Each method requires the creation of an Error Budget.And there is one final step...The ‘Independent Samples t Test’ is performed to show agreement between the two independently Certified Values.If there is no agreement, one or both methods have an error, identification of the error(s) must occur before release of the CRMThe validity of this approach rests upon the accuracy of the uncertainty calculation, the inclusion of all possible sources of error, and a demonstration that the two methods used have Means that are statistically in agreement. 'Confirm, Confirm, Certify. Verify, Never Assume'