The DR900 by Hach is a robust, portable colorimeter, capable of performing many dozens of different tests, supporting the Hach chemistry type. It can accept a number of different sizes cuvettes/samples cells – 1 inch round sample cells 1cm sample cells 16mm COD/TNT vials [caption id="attachment_15641" align="aligncenter" width="300"] Hach DR900 colorimeter[/caption] Every Hach method c...
Suspended solids is widely used as an indicator of water purity, particularly in discharge consent. When testing by the full gravimetric method, a balance, oven and desiccator are required to thoroughly dry the isolated solids until a constant weight is found. (For more details on this, see our previous post about the difference between gravimetric testing and other methods.) It may be te...
The new BD600 BOD measurement system from Lovibond replaced their Oxidirect system in 2015 and has proved to be a popular tool amongst users with it's handy remote control and built in graph features. But did you know that the system is also mercury free? [caption id="attachment_6963" align="aligncenter" width="300"] The new BD600 BOD system from Lovibond[/caption] The modern integral ...
COD tests are vital in many industries for the monitoring of effluent and discharge consent. The most common test method involves using COD vials - sample is pipetted into the vial where it mixes with the reagents already present in the vial. This is then reacted at high temperatures, producing a colour change. This colour change is analysed in a colorimeter, which reads out the result of CO...
The measurement of Suspended Solids is often required for discharge consent, and values may be reported to the Environment Agency (EA). [caption id="attachment_8215" align="aligncenter" width="200"] Suspended solids give water a cloudy appearance[/caption] There are several methods for testing the suspended solids present in a water sample, here we discuss the differences between the differen...
Q: How should I clean my Hach PourThru (pour through) cell? [caption id="attachment_8081" align="aligncenter" width="300"] The LZV899 Pour Thru cell kit for Hach tests[/caption] Pour Thru cells are used in some Hach tests for fast testing without the need for individual glass sample cells. The solution to be analysed is delivered to the cell by a funnel and tubing setup, and then flows out ...
