To prevent students from "fudging" sensor data, users cannot change sensor readings taken in our data collection apps such as Graphical Analysis and Spectral Analysis. However, data that is manually entered into the app by the user can be modified a...
There are a few ways in which to use Vernier sensors with LEGO hardware and software. But those connection options are fairly limited, as outlined below.
The NXT Sensor Adapter (BTA-NXT) provides the ability to connect certain Vernier LabQuest a...
Go Direct UV-VIS Spectrophotometer
For general instructions, see Specifications and User Guide
Vernier UV-VIS Spectrophotometer
For general instructions, see Specifications and User Guide
TROUBLESHOOTING
Primary Test: Are you using LabQuest A...
WHAT IS THE A260/A280 RATIO?
This ratio is used to determine the purity of a DNA or protein sample. Contamination of a nucleic acid solution by proteins, carbohydrates, and other organic molecules can be determined using a procedure called the A2...
Yes, the following Vernier spectrometers can be used to assess DNA purity and concentration:
Go Direct® UV-VIS Spectrophotometer (GDX-SPEC-UV)
Vernier UV-VIS Spectrophotometer (VSP-UV)
Go Direct® Fluorescence/UV-VIS Spectrophotometer (GDX-SP...
A full spectrum is taken in order to identify the wavelength for analysis. If you already know the wavelength for analysis, then a full spectrum is not necessary. To set up data collection for modes other than full spectrum, follow the instructions ...
We have posted several Spectrometer lab experiments on our website for all of our spectrometers. To find the labs, go to the individual spectrometer's webpage and click on the "Experiments" tab.
Go Direct® SpectroVis® Plus Spectrophotometer ...
If your spectrometer isn’t calibrating or is showing unusually noisy or high absorbance values (often above 3 or blank), the issue may be due to insufficient light reaching the detector. This happens when:
The light source is weak in a certain...
Sometimes the counts from the light striking a pixel is not sufficiently different from the counts when the pixel is in the dark to make a reliable absorbance reading. This can happen either when the light source is weak in that spectral region, or w...
The Conductivity Probe (CON-BTA) is automatically temperature compensated between temperatures of 5 and 35°C. Note that the temperature of a solution is being read by a thermistor that extends into the space between the graphite electrodes. Readings...