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Near Infrared Wavelength Reference, NIST Traceable
For assessing wavelength accuracy of NIR spectrophotometers
Description Quartz cell in either Transmittance or Transmittance/Transflectance format, NIST Traceable with UKAS ISO-17025 accredited certificate of calibration
Primary Usage Assessment of the wavelength scale accuracy in the NIR spectrum
Useable Range 990nm to 2537nm
Physical Configuration Near IR quartz cell that has been permanently sealed by heat fusion
NIST Traceability Each set is supplied with a Certificate of Analysis and NIST Traceability
ISO Accredited Accredited by UKAS ISO 17025, ISO Guide34 and ISO 9001

Product Description

The reference is used to validate the wavelength scale of a NIR spectrophotometer. The reference contains 13 certified peaks from 990 to 2537nm that include some complex peaks for instrument resolution evaluation. The reference is available in two formats:

Transmittance- 10mm optical pathlength with two clear windows (opposite windows to allow light to pass through the cell).

Transmittance/Transflectance- 5mm or 10mm optical pathlength, depending on orientation. In the 5mm configuration, the rear window is mirror coated to provide reflectance optical return so the pathlength is effectivly 10mm (2x5mm = 10mm).

Each reference set is supplied with full certification and traceability to NIST through SRM-2065. The reference material is produced and certified in our ISO Guide 34 and ISO/IEC 17025 accredited laboratory. The reference can also be recertified as required.

Resolvable Peaks:
990.7 nm
1154.9 nm
1446.6 nm
1652.3 nm
1693.1 nm
1948.0 nm
2060.1 nm
2248.2 nm
2353.3 nm
2373.4 nm
2385.4 nm
2537.5 nm

Suggestions for Use

This reference presents a wide range of resolvable peaks which are easy to correlate with the wavelength indicator on your spectrophotometer. The first procedure should be to scan the NIR Wavelength reference cell over the useable range to assure that all of the peaks can be resolved. Alter the slit width and scan rate to produce a useable spectra. Check each peak to assure that the reading on your spectrophotometer is within the manufacturer's tolerances for the wavelength of your spectrophotometer. If not, get a service technician to check and, if necessary, adjust your instrument. The Rare Earth reference is measured against an air blank.

Periodically check the spectra. The periodic use of your NIR Wavelength cell will build a log of your instrument's wavelength accuracy for use with certification and troubleshooting should the correlation change over time.


Absorbance vs Wavelength Scan of NIR Wavelength reference


Interpretation of Results

Compare the wavelength peaks from your instrument with the expected values on the certificate supplied with the reference set. If the readings are within the expected range for your instrument then your wavelength scale is correct. If not, consult your service technician and have the instrument evaluated.

Quality program

Each time that the analysis is repeated you can compare the new results with the previous results to check for any variance. If your instrument needs service because of a change in resolution, the historical data will greatly assist the service technician.

How to Order

Catalog Number Description Price each
RM-NIR NIR Wavelength Transmittance Reference,
NIST traceable and ISO 17025
US$ 1,290.00
RM-NIR/T NIR Wavelength Transmittance/Transflectance Reference,
NIST traceable and ISO 17025
US$ 1,480.00

Download MSDS Sheet for NIR Wavelength Reference