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Author Comment Last activity Moderation
Ag8n "Well, there are a couple of options. One is that the calibration standard is off. You'd have to get another instrument to check that out. The ot..." | Read more » almost 3 years ago
Ag8n "Another good approach is to call the make of the monitors. They would probably have a good idea if this is normal. Regards. " | Read more » almost 3 years ago
Ag8n "Well, first question. Are the two monitors of the same model and were they bought at about the same time? " | Read more » almost 3 years ago
Ag8n "Pleasure to meet you! Hope to work with you on the future! " | Read more » almost 3 years ago
Ag8n "There are test strips available for those, too. The more expensive ones are for testing drinking water. The cheaper test strips are for testing fi..." | Read more » almost 3 years ago
Ag8n "One of the chapters in the book is "Biosensors for the determination of heavy metals in water". The chapter is by Amra Odobasic, Indira Sestan, an..." | Read more » almost 3 years ago
Ag8n "There were some books on " Biosensors for environmental engineering" published a couple of years ago. They had chapters on heavy metal detection. ..." | Read more » almost 3 years ago
Ag8n "The reason I ask- the EPA testing will always be expensive. Sometimes you can do some "screening" pH tests that are much cheaper. These would be ..." | Read more » almost 3 years ago
Ag8n "If you shop on the commercial sites, there are claims that their kits ( for a variety of tests) will cover soil even though the kits are designed f..." | Read more » almost 3 years ago
Ag8n "Can you give more information on the pH test is being done? Who is doing it? What instrument is being used? Thanks for the help. " | Read more » almost 3 years ago
Ag8n "If a source like the sun or an incandescent lamp is used, then maybe using a photographic bg20 filter as a standard would do. The spectrum they a..." | Read more » almost 3 years ago
Ag8n "There is a closely related chemical recently added to the USP for uv/vis standardization. It is a solution of didymium. Some places also use a gl..." | Read more » almost 3 years ago
Ag8n "https://youtu.be/u5tUmdWALn0 Hopefully, this link works to the video " | Read more » almost 3 years ago
Ag8n "Of you take a look at commercial instruments, they will usually use holmium oxide or other holmium salts for calibration. Great. These salts are ..." | Read more » almost 3 years ago
Ag8n "Found something.It's a YouTube post by chem_talk on neodymium. It's a long way from complete, but according to the post, this rare earth isn't rar..." | Read more » almost 3 years ago
Ag8n "Please do not take this wrong. Your work is impressive. But part of science is asking questions, including questions on the testing done. So here..." | Read more » almost 3 years ago
Ag8n "Please double check the oxygen calculation and calibration of the instrument. Humans can't survive on that low a level of oxygen. So, at the very l..." | Read more » almost 3 years ago
Ag8n "A further note. Wait until the source is identified to get the waste water/testing done. " | Read more » almost 3 years ago
Ag8n "The local industries are required to report the chemicals they give off to the EPA. Some paperwork might give an idea of the chemical. Dealing wit..." | Read more » almost 3 years ago
Ag8n "Yes,I see what you mean. Got a weird approach for the problem. First, please become a little familiar with rtlsdr dongles by going to rtl-sdr.com...." | Read more » almost 3 years ago
Ag8n "Just going down that road a little bit further. What distance do you need to cover and at what data rate? There are wireless bands on 900mhz IS..." | Read more » almost 3 years ago
Ag8n "I would encourage you to keep looking for mercury in soil. However, mercury is a difficult element to analyze safely and very dangerous to handle...." | Read more » almost 3 years ago
Ag8n "Project CyAN with the EPA might be of interest. It is using a newly launched satellite to track cyanobacteria. The new satellite was launched 5-6..." | Read more » almost 3 years ago
Ag8n "Ammonia, as from fertilizer, would also increase the pH. It would make the algae like the water, too. There are several methods to test for ammoni..." | Read more » almost 3 years ago