Sigma-Aldrich Potassium Dichromate Stand

Grade

analytical standard

Quality Level

100

Technique(S)

UV/Vis spectroscopy: suitable

Application(S)

environmental
pharmaceutical

Format

mixture

Storage Temp.

15-25°C

Related Categories

Physical & Chemical Property Standards

General Description

Test set for calibrating the absorbance of spectrophotometers

Application

• Potassium dichromate standard solutions in sulfuric acid (0.01N) for calibrating the absorbance of spectrophotometers
• Applicable for quality control checks and system suitability tests
• May be used to calibrate a newly installed instrument or after a major repair of an instrument

Analysis Note

Absorbance measured in a 10 mm cells at 20 ± 1 °C against sulfuric acid reference solution:
50 mg/l 100 mg/l
235 nm 0.621 ± 0.02 1.242 ± 0.02
257 nm 0.722 ± 0.02 1.444 ± 0.02
313 nm 0.242 ± 0.02 0.484 ± 0.02
350 nm 0.536 ± 0.02 1.071 ± 0.02
Absorbance (235 nm; 50 mg/l): 0.601 - 0.641
Absorbance (257 nm; 50 mg/l): 0.702 - 0.742
Absorbance (313 nm; 50 mg/l): 0.222 - 0.262
Absorbance (350 nm; 50 mg/l): 0.516 - 0.556
Absorbance (235 nm; 100 mg/l): 1.222 - 1.262
Absorbance (257 nm; 100 mg/l): 1.424 - 1.464
Absorbance (313 nm; 100 mg/l): 0.464 - 0.504
Absorbance (350 nm; 100 mg/l): 1.051 - 1.091

Storage Class

12 - Non Combustible Liquids

Wgk_Germany

WGK 1

Flash_Point_F

Not applicable

Flash_Point_C

Not applicable