User Guide

For an introduction to the application and use of Certified Reference Materials in absorption spectrophotometry

 
 
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PRODUCT ENQUIRY



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FURTHER PRODUCT INFORMATION 
& HOW TO ORDER    
 

This Reference Material can be used to qualify the accuracy and linearity of the absorbance scale of spectrophotometers in the far ultraviolet region of the spectrum (210 nm – 260 nm).
The reference comprises Nicotinic acid solutions with concentrations from 6 to 24 mg/l in dilute (0.1 M) hydrochloric acid, sealed in high quality far UV quartz cells.  Supplied with a 0.1 M hydrochloric acid blank.
The spectrum of nicotinic acid, when prepared in acid solution, has characteristic peaks at approximately 213 nm and 261 nm.

Nicotinic-Acid- 

 

 nicotinic-acid-solutions

Over this concentration range the graph of Absorbance against concentration is linear. 

nicotinic-acid

 

A Certificate of Calibration and Traceability and full instructions for use are provided with each Reference Material. Starna Scientific is accredited to both ISO 17034 (4001) as a Reference Material producer, and ISO/IEC 17025 (0659) as a Calibration Laboratory for optical reference measurements. Starna offers a Lifetime Guarantee on all its Reference Materials.