Control of photometric linearity with certified reference materials

In the new European Pharmacopoeia (EP 10), as well as in the 2019 update of USP 857, the control of photometric linearity is required.

For to check the photometric linearity, at least 3 absorption filters with different concentrations are required.

Hellma Analytics offers the following reference materials to check the photometric linearity of your spectrophotometer:

Absorption filters to check photometric linearity in the UV-range:

Absorption filters to check photometric linearity in the Vis-range:

Helpful tool for checking photometric linearity

In this Excel tool, which is available for download, you can easily check the linearity of your spectrometer. Based on your input the correlation coefficient is automatically calculated and the the values are also shown graphically. If the measured values ​​deviate too much from the linear trend line (R² <0.999) the R² field is automatically colored red.

Note for Linearity:
The correlation coefficient is a measure of the degree of linear correlation, if this is 1, all measured values are on a straight line and thus completely linear with each other. The coefficient of determination R² is the square of the correlation coefficient. The European Pharmacopoeia (EP 10) requires R² > 0,999.

Control of photometric linearity (Tool)

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European Pharmacopoeia 10th Edition - EP10 (Folder EN)

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Control of photometric linearity (Tool)

Download

Thank you very much for your interest in our download of "Control of photometric linearity (Tool)". Please fill in the form below and we will send you the requested link to the given e-mail address.


Note: Your data will of course be treated confidentially and will not be shared with third parties. You can revoke your consent at any time by clicking on the end of each e-mail.
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Photometric Accuracy F2, F3, F4 (Control Charts)

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Thank you very much for your interest in our download of "Photometric Accuracy F2, F3, F4 (Control Charts)". Please fill in the form below and we will send you the requested link to the given e-mail address.


Note: Your data will of course be treated confidentially and will not be shared with third parties. You can revoke your consent at any time by clicking on the end of each e-mail.
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Reference Materials (Brochure & User Manual EN)

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Phone: +1 5169 3908 88
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http://www.hellmausa.com

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Note: Your data will of course be treated confidentially and will not be shared with third parties. You can revoke your consent at any time by clicking on the end of each e-mail.
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