User Guide

For an introduction to the application and use of Certified Reference Materials in absorption spectrophotometry

Tools for Easier Compliance

US kit

UV Qualification Set

Part number: RM-USP

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PRODUCT ENQUIRY

This set contains Starna Certified Reference Materials to qualify a UV spectrophotometer to USP Chapter <857>

Potassium Dichromate 60 mg/l & blank cell Photometric Accuracy, 235 - 350 nm More information
Holmium Oxide Solution cell  Wavelength Accuracy, 240 - 640 nm More information
Potassium Chloride 10 & 5 mm cells Stray Light, 190 - 205 nm  More information
Sodium Iodide 10 & 5 mm cells  Stray Light, 210 - 259 nm  More information
Acetone 10 & 5 mm cells  Stray Light, 250 - 320 nm More information
Sodium Nitrite 10 & 5 mm cells Stray Light, 300 - 385 nm More information
Toluene in Hexane & blank cell Resolution, 267 - 269 nm More information

UV Qualification Set
with Linearity Check

 

Part number RM-USP/3LIN

 

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PRODUCT ENQUIRY

This set is the same as RM-USP, but contains two additional potassium dichromate references for checking photometric linearity.

Potassium Dichromate 60 mg/l & blank cell Photometric Accuracy, 235 - 350 nm More information
Potassium Dichromate 20 mg /l Photometric Accuracy, 235 - 350 nm More information
Potassium Dichromate 100 mg/l Photometric Accuracy, 235 - 350 nm More information
Holmium Oxide Solution cell Wavelength Accuracy, 240 - 640 nm More information
Potassium Chloride 10 & 5 mm cells Stray Light, 190 - 205 nm More information
Sodium Iodide 10 & 5 mm cells Stray Light, 210 - 259 nm More information
Acetone 10 & 5 mm cells Stray Light, 250 - 320 nm More information
Sodium Nitrite 10 & 5 mm cells Stray Light, 300 - 385 nm More information
Toluene in Hexane & blank cell Resolution, 267 - 269 nm More information

USP Visible Transmittance/
Absorbance and
Wavelength Set 

 

Part number RM-1N3N5DHG

 

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PRODUCT ENQUIRY

These references are recommended in USP Chapter <857> for the qualification of spectrophotometers in the Visible region:

Absorbance Accuracy, 440-635 nm Neutral Density Filters
(1.00, 0.50 & 0.25 A)
More information
Wavelength Accuracy, 240 - 640 nm Holmium Glass Filter More information

NIST SRM Equivalent Sets:

 

More information

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PRODUCT ENQUIRY

These SRMs are specifically cited in USP <857> as evidence of NIST traceability.

SRM 930e Set Part number RM-1N2N3N  
Absorbance Accuracy, 440-635 nm Neutral Density Filters: 10, 20 & 30 %T
SRM 1930 Set Part number N1N35N  
Absorbance Accuracy, 440-635 nm Neutral Density Filters: 1, 3 & 50 %T 
SRM 2930 Set Part number RM-D1D39N  
Absorbance Accuracy, 440-635 nm Neutral Density Filters 0.1, 0.3 &92 %T
Combined SRM Set: Part Number RM-SRM9ND  
Absorbance Accuracy, 440-635 nm All 9 Neutral Density Filters listed above

UV Absorbance Scale & Linearity validation:

 

More information

 

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PRODUCT ENQUIRY

For method validation, USP <857> recommends that absorbance linearity is checked with five or more analyte concentrations. The following Potassium Dichromate sets allow instrument linearity to be checked over the relevant absorbance range.

Photometric Linearity Set, 0.095A -1.5A Part Number RM-0204060810 
Potassium Dichromate 20, 40, 60, 80, 100 mg/l & blank cell
Photometric Linearity Set, 1.5A- 3.3A Part Number RM-121416182224 
Potassium Dichromate 120, 140, 160, 180, 220 & 240 mg/l & blank cell 
Photometric Linearity Set, 0.19A - 3.3A Part Number RM-040812162024 
Potassium Dichromate 40, 80, 120, 160, 200 & 240 mg/l & blank cell