Measuring proteins with the Bradford assay
Methods for measuring protein concentration using the Open Colorimeter and 595nm LED.
Soil Active Carbon - POXC
This week we have a guest author post from Fabricio Cano, Pablo Cremades and Nano Castro. They are members of reGOSH in Argentina where they have been developing open hardware tools and methods for measuring soil active carbon.
Measuring beer color with a 430nm colorimeter
Revisiting and sharing some of our earlier work developing a beer color test for home brewers.
Measuring turbidity with a modified Open Colorimeter
In this post we describe a prototype right-angle (R/A) cuvette holder for turbidity measurements.
Ammonia, nitrate and nitrite Open Colorimeter assays for water quality testing
Testing three water quality tests for the Open Colorimeter. These assays are ammonia, nitrate and nitrite.
Nitrate-API colorimetric assay
Colorimetric assay for measuring nitrate levels using API test kit. Range: 0-50ppm
Ammonia-API colorimetric assay
Colorimetric assay for measuring ammonia levels using API test kit. Range: 0-8ppm