With the reference plate 666R013 from Hellma Analytics the photometric accuracy of microplate readers can be checked.
The reference plate has the same dimensions as a microplate with 96 wells and a 6.6 mm diameter per window (H 13.0 x D 127 x L 85.5 mm).
For the five inserted neutral density glasses (columns 3-12) the absorbance value can be measured for 16 windows. Another 16 windows are without glass (columns 1+2) and are used as reference.
The reference plate consists of five neutral density glasses with different nominal absorbance values. Therefore the linearity of the absorbance scale can be checked by plotting the absorbance values for each wavelength in a diagram against the measuring values on the DAkkS calibration certificate.
|Article-No.||666R013 Request this article|
|Application||Reference plate for microplate readers |
for checking the photometric accuracy
|Content||Column 1+2: empty - reference |
Column 3+4: ND with 0.25 Abs
Column 5+6: ND with 0.5 Abs
Column 7+8: ND with 1.0 Abs
Column +10: ND with 1.5 Abs
Column 11+12: ND with 2.5 Abs
|Standard Certification||Photometric accuracy certified with DAkkS calibration certificate at |
Wavelengths: 405, 450, 490, 650 nm; at 8 Points in a row
Slit width: 1 nm
|Possible Certification||Wavelengths: all possible between 405 bis 890 nm; above 890 nm also possible but only with Hellma Analytics calibration certificate; |
Slit widths: all up to 5 nm possible
Control charts, such as e.g. target value charts are used to graphically display measured values. Here, the value specified in the Hellma Analytics calibration certificate is used as the target value. All measured values must be within the range of the measurement uncertainty, otherwise there is an out-of-control situation.