Starna Scientific has extended the absorbance scale range of its potassium dichromate linearity set of Certified Reference Materials to address a customer requirement in Quality Assurance laboratories to make multi-point linearity checks across the UV absorbance range.

The use of potassium dichromate solvated in dilute perchloric acid is an established method for the validation of the absorbance scale and linearity of a spectrophotometer in the UV region, and Starna’s new potassium dichromate linearity offering, which is immediately available and requires no preparation time, has been created to prove the linearity of the spectrophotometer UV absorbance scale up to 3.5 A using a range of 0 to 240 mg/l solutions.

Formal verification, via a Qualification protocol, that a UV spectrophotometer’s absorbance scale is accurate within the specification of the instrument’s manufacturer is a requirement for many regulated industries and research laboratories.

Starna is an ISO/IEC 17025 and ISO Guide 34 accredited Reference Material producer so the company’s Certified Reference Materials provide a convenient and recognised validation method. Full documentation on measurement, handling and storage is also provided with each set of CRMs.

A key benefit for pharmaceutical QA managers is that the reference is truly traceable to NIST primary SRM 935a because solutions are prepared from the SRM, and prepared in accordance with NIST Special Publication SP260-54. In addition, the reference spectrophotometer is qualified against primary physical constants, and other NIST primary SRMs.

Visit www.starna.com for more information.

For more information about this press release please contact:

Phoenix MarCom Ltd

Tel: + 44 (0) 1223 873318

Fax: + 44 (0) 1223 874173

Email: marketing@phoenixmarcom.co.uk

John Webster

Starna® Cells Inc PO Box 1919

Atascadero CA 93423

Tel: 800 228 4482

www.starna.com

For technical or sales advice please contact Starna Cells Inc.

Starna® products are manufactured at the Starna Scientific (formerly Optiglass) factory founded in 1964, whose lineage of optical expertise is traceable to the early part of the last century. Starna Scientific Limited is a wholly owned subsidiary of the international group of Starna companies whose reputation is synonymous with quality and service in the manufacture and supply of spectrophotometer cells, optical components and certified reference materials.

All Starna products are manufactured in an environment conforming to the latest ISO 9001:2000 standard. Starna Scientific is also accredited by UKAS as a Certified Reference Material Producer. This internationally recognised accreditation is only awarded to CRM producers whose manufacturing and calibration processes satisfy both ISO Guide 34 and ISO 17025. This unique combination of manufacturing and application skills makes Starna a much valued partner to instrument manufacturers, distributors and end users worldwide