Lab Thoughts

I read this article recently on pH probes recently published through an industry newsletter. It walks through a decision making process used to identify whether a probe is experiencing a minor issue, or no longer working. Do you use a process like this? Do you have your own process for troubleshooting pH probes? I'd like to hear what you use to decide. Post and share, your knowledge can help someone within the industry. 


"In simplest terms, turbidity is the optical property that results when light interacts with suspended particles in solution (most commonly water)."


In the first section of this selection from Mike Sadar's article on turbidity, we look at the theory of light scattering and the basics of interference. Come back for the next installment where we talk about eliminating interference. 




Sometimes it is good to take a step back and decide if we are asking the right questions. This short  clip walks through some of the basics around nitrogen testing. How do you analyze nutrients? Why do you test? Time to take a short break from everything else and look back at the basics. Basic Nutrient Lab Methods.


We love it when technology allows us to bring great things together. This is pretty new. Hach has released a virtual catalog and Mobile App. Available on both iTunes and Google markets, this catalog has robust search capabilities, allows you to access videos and educational content directly from the app, as well as go directly to purchase. We would be interested in hearing about your experience with the app. You can download here:

Hach App


Then come back and tell us what you think. 



Red rod technology in pH probes? What is that about? Are you looking at red rod technology in your probes for the future? What have you read? What have you heard? What do you think?


Do you know the primary differences between digital and analog probes/meters? Does that knowledge help you make purchasing decisions? Check out this technical note about digital and analog.


Have you ever replaced the salt bridge and buffer solution on a differential pH probe? Watch this quick video to check it out. 



Hello everyone. It's been a long week here, so I thought it appropriate to end with a little bit of Friday fun. Keeping to the water theme, here is a pretty cool video. 






Are you interested in how temperature is affecting your pH buffers and samples? Read this technical note from Hach application experts that discusses pH measurement and temperature compensation. 


Its likely you use a pH Electrode frequently. But can you name the five major parts that make up the electrode? Do you know the different diaphragm types? The document below is a great introduction and overview of pH electrodes. 

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