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Frequently Asked Questions
How come I am unable to read high concentrations of ammonium on my AquaFluor with a cuvette? Why do I need to use the minicells?
Due to the optical configuration for the AquaFluor ammonium channel large volumes of highly concentrated samples over-saturate the sensor. Rather than reducing the sensitivity and linear range of the optics by adding an attenuator plate, we advise using the smaller volume minicells that achieve these limits. Readings on the ammonium channel using plastic cuvettes have a maximum range of approximately 10 µM, whereas minicells are required to achieve maximum range readings of >10 to100 µM. Turner Designs now includes a minicell adapter and minicells with your order of an AquaFluor with an ammonium channel.
How come when I received my AquaFluor channels are labeled A and B? I am measuring chlorophyll and turbidity, is it possible to change the labels?
If you would like to change the labels on the AquaFluor it is a very simple fix:
1. When the instrument is first turned on and going through the countdown you need to press the <CAL> button 6 times.
2. This will bring up a screen that says A = A, you can then use the <ENTER> button to select the title of choice. For example A = CHL.
3. Once you have selected the title you want, press the <ESC> button and the change is made.
What turbidity standards should I use to calibrate the AquaFluor?
GFS Chemicals has developed and certified new turbidity standards that are specifically engineered for optimal performance of Turner Designs instruments. The AquaFluor has specific primary turbidity standards that should be used when calibrating.
10 NTU - GFS Part Number 8545
100 NTU - GFS Part Number 8546
GFS Chemicals Inc.
3041 Home Road, Powell, OH 43065
Amco Clear Water Analysis Division GFS Chemicals Inc.
Where can I find information about the AquaFluor applications and optical specifications?
Please refer to the Optical Specification Guide for the AquaFluor.
What are the upper and lower sensitivity limitations for reading Chlorophyll on the
The specification range for Chlorophyll is approximately 0.3µg/L - 300µg/L. This information is also available on the Optical Specification Guide for the AquaFluor. Turbidity can effect the limitations. The link below describes how to compensate for the effects of turbidity
How do I recover a turned off channel on the
Please follow the steps below to recover a lost channel. This information is also available on the AquaFluor Quick Diagnosis Guide
What cuvette do I need to use for Optical Brightener application of the
For Optical Brighteners we recommend using Methacrylate cuvettes, or glass or quartz test tubes. Please refer to the Optical Specification Guide for the AquaFluor for additional information.
What can I do if the
AquaFluor display is too dark or too light?
lease follow the steps below to adjust the display. This information is also available on the AquaFluor Quick Diagnosis Guide
How do I use the solid secondary standard P/N 8000-952 or 8000-951 with the
The solid secondary standard is a great tool for tracking instrument performance and can be used after calibration with a primary standard to check the AquaFluor. On a periodic basis, before making measurements with the AquaFluor, use the solid secondary standard to verify the calibration. If the solid secondary standard value has changed by more than ± 5% of its assigned value, the AquaFluor should be recalibrated.
The solid secondary standard can also be used to set the instrument for in vivo applications. Please refer to the video AquaFluor Qualitative Calibration: In Vivo Chlorophyll below.
That video was great, do you have any other videos on the AquaFluor?
Please check out our video webpage. http://www.youtube.com/turnerdesignsinc
What can I use to calibrate my AquaFluor?
Turner Designs sells liquid dye standards that can be used for calibration. Please refer to the technical note below for instructions and recommended part numbers.
How do I know which cuvette or vial is the best option for my application?
e have put together a quick reference to help you decide, please visit http://docs.turnerdesigns.com/t2/doc/tech-notes/S-0256.pdf