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Sodium Nitrite liquid filter to check stray light at 385nm

The sodium nitrite liquid filter consists of 50g/l sodium nitrite in pure water. This filter is suited to check the stray light of a spectrometer in the spectral range between 300 nm and 385 nm, its cut off is at about 385 nm.

Please note

Currently there are different methods used in the European Pharmacopoeia (EP) and the United States Pharmacopoeia (USP) to determine the stray light.


  • Testing accoring to EP (European Pharmacopoeia):
Measurement of sodium nitirite (UV11) against reference filter pure water (UV12)


  • Testing accoring to USP 857 (U.S. Pharmacopoeia):
Measurement of sodium nitrite (UV11, PL 10mm) against reference filter natrium nitrite (UV11H, PL 5mm)

Article-no.EP Set: 667102 (667011 (UV11) / 667012 (UV12))
USP-Set: 667102H (667011 (UV11) / 667011H (UV11H))
ApplicationTo check stray light in the spectral range from 300 to 385 nm according to EP and USP
ContentNatrium nitrite 50g/l in pure water
Standard certificationCut-off wavelength: 385 nm
Slit width: 2nm
with DAkkS calibration certificate
Possible certificationsCut-off wavelength fixed
Slit width: all until 5nm

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