Spex CertiPrep UV-323W 7-methoxycoumarin-4-acetic acid UV-VIS Standard, 41 ppm, in Water; 3.5 mL

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Spex CertiPrep Item # EW-41057-84
Organic certified reference standards for UV-VIS
  • Standards cover a wide range of wavelengths
  • Organic dyes absorb strongly in the UV-VIS region
  • Accredited by A2LA to ISO/IEC 1205:2017 and ISO 17034:2016
  • 323 nm wavelength

SPECS & DESCRIPTION

Specifications & Description

  • Concentration41 ppm
  • MatrixWater
  • Element/Ion7-methoxycoumarin-4-acetic acid
  • Volume (mL)3.5
  • CAS Number62935-72-2
  • Shelf Life (days)365
  • Shelf Life (months)12
  • Description7-methoxycoumarin-4-acetic acid UV-VIS Standard, 41 ppm, in Water; 3.5 mL

Includes

Supplier Certificate of Analysis (CoA) is included with product shipment.

Key Features

  • Standards cover a wide range of wavelengths
  • Organic dyes absorb strongly in the UV-VIS region
  • Accredited by A2LA to ISO/IEC 1205:2017 and ISO 17034:2016
  • 323 nm wavelength

More About this Item

UV-VIS internal standards allow you to accurately measure the concentration of your samples by directly comparing the absorbance of your compounds against that of the internal standard. There are six different standards offered that cover a wide range of wavelengths (270 nm to 570 nm). Once you take a UV-VIS spectrum of your sample, you can easily find a region in the spectrum that doesn’t absorb, and then select the corresponding internal standard, and rerun the spectrum.

All six standards are organic dyes, which absorb very strongly in the UV-VIS region. This means the standards are very low concentrations, which minimizes the possibility that it will hinder solubility of the combination of standard and sample. Standards come in 5 mL ampules and contain 3.5 mL of standard, which is the standard volume to fill a cuvette.

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