PRODUCT SHEET

Starna Green Broadband References (250 – 650 nm)

The Instrument Qualification Kits are designed to assist laboratories in meeting the updated requirements of USP chapter 857 and European Pharmacopoeia (EP) 2.2.25 for UV-Visible spectrophotometer validation. These standards, effective since December 2019 and January 2020 respectively, mandate qualification of absorbance linearity, wavelength accuracy, stray light, and resolution/bandwidth using references that bracket the measurement parameters.

The Basic Qualification Kits include carefully selected Certified Reference Materials (CRMs) for qualifying wavelength accuracy, absorbance accuracy and linearity over specified ranges, as well as stray light and resolution. Potassium Chloride solution is included as a sensitive indicator of optical degradation even outside far UV applications. While these kits cover the common pharmaceutical analysis ranges, additional references are available for customized measurement conditions.

Features and Purposes
  • Wavelength accuracy: Holmium cell covering 240 – 650 nm
  • Absorbance accuracy and linearity (0 – 1 A): Potassium dichromate at 20, 60 & 100 mg/l and blank cell measured over 235 – 350 nm
  • Stray light measurement using multiple references: Potassium chloride at 200 nm, sodium iodide at 220 nm, potassium iodide at 250 nm, and sodium nitrite at 340 & 370 nm, effective from 200 – 370 nm
  • Resolution/bandwidth qualification with toluene in hexane over 265 – 270 nm
  • Kits designed according to USP Chapter Method B stray light compliance
DOCUMENTS AND RESOURCES
Certified Reference Materials for Spectroscopy
Starna Cell Catalogue Micro Rectangular Spectrophotometer Cells and Optical Components
Spectrophotometer UV Stray Light Qualification Filter Ratio Method
PRODUCT SHEET

Starna Green Broadband References (250 – 650 nm)

The Instrument Qualification Kits are designed to assist laboratories in meeting the updated requirements of USP chapter 857 and European Pharmacopoeia (EP) 2.2.25 for UV-Visible spectrophotometer validation. These standards, effective since December 2019 and January 2020 respectively, mandate qualification of absorbance linearity, wavelength accuracy, stray light, and resolution/bandwidth using references that bracket the measurement parameters.

The Basic Qualification Kits include carefully selected Certified Reference Materials (CRMs) for qualifying wavelength accuracy, absorbance accuracy and linearity over specified ranges, as well as stray light and resolution. Potassium Chloride solution is included as a sensitive indicator of optical degradation even outside far UV applications. While these kits cover the common pharmaceutical analysis ranges, additional references are available for customized measurement conditions.

Features and Purposes
  • Wavelength accuracy: Holmium cell covering 240 – 650 nm
  • Absorbance accuracy and linearity (0 – 1 A): Potassium dichromate at 20, 60 & 100 mg/l and blank cell measured over 235 – 350 nm
  • Stray light measurement using multiple references: Potassium chloride at 200 nm, sodium iodide at 220 nm, potassium iodide at 250 nm, and sodium nitrite at 340 & 370 nm, effective from 200 – 370 nm
  • Resolution/bandwidth qualification with toluene in hexane over 265 – 270 nm
  • Kits designed according to USP Chapter Method B stray light compliance
DOCUMENTS AND RESOURCES
Certified Reference Materials for Spectroscopy
Starna Cell Catalogue Micro Rectangular Spectrophotometer Cells and Optical Components
Spectrophotometer UV Stray Light Qualification Filter Ratio Method

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