Liquid Holmium Perchlorate Wavelength Standard (240-640nm)


Liquid Holmium Perchlorate Wavelength Standard (240-640nm)


FireflySci Holmium perchlorate (4% w/v) in 10% perchloric acid (v/v). This corresponds with the European Pharmacopoeia requirement for 40g/L holmium oxide in perchloric acid containing 141g/L of HClO4. This wavelength standard is provided in a standard 10mm quartz cuvette to ensure optimal calibration.

Please allow approximately 2 weeks for delivery.

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Wavelength Peaks:

The Firefly Holmium filter is used to calibrate wavelength accuracy in the 240-650 nm range.

The Firefly Holmium wavelength filter has the following peaks:  (see chart below)

  • 240.8

  • 277.8

  • 287.1

  • 361.1

  • 416.4

  • 451.2

  • 485.2

  • 536.5

  • 640.5

Please note that this is a liquid calibration filter and does not come with the same Lifetime Warranty as Firefly's Solid State Standards.  The Firefly liquid holmium filter must be recalibrated every year according to NIST guidelines.

For customer interested in our solid state Holmium filter that never requires recalibration due to material aging please see the link below.

Firefly WAV-1 UV/VIS Holmium Oxide Glass Filter


Store the product at room temperature to prevent damage

All Firefly calibration standards are NIST traceable and NIST compliant. Performance of all Firefly reference calibration standards, including but not limited to this standard, meet or exceed NIST requirements.

Recalibration of Firefly liquid calibration standards are periodically required as per NIST guidelines. Firefly will provide periodic recalibrations accordingly. Please contact us for more information.

Included with Holmium Perchlorate Liquid Calibration Standard

SRM-HO Liquid Holmium Sample Certificate of Calibration

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