Hellma^® liquid calibration standards set

Certified liquid Hellma^® calibration standard to enable the checking of spectrophotometers with respect to resolution of the spectral bandwidth.

Consisting of :
Toluene in n-Hexane (667-UV6, scan 265 - 270 nm)
n-Hexane reference filter (667-UV9, scan 265 - 270 nm)

To check the resolution power of a spectrophotometer, the ratio of the peak maximum at λ_max (269 nm) to the absorbance of the minimum at λ_min (266 nm) is calculated. This gives a measure of the spectral bandwidth of the instrument.

Determination of the resolution is carried out against the 667-UV9 hexane blank reference filter, which is supplied with every filter set. Measurement is the same for all bandwidths. The wavelength range between 265 nm and 270 nm is scanned and the peak maxima and minima are determined. Then the peak/trough ratio is calculated and compared to the reference values.

Hellma is a registered trademark of Hellma GmbH