Comments

Author Comment Last activity Moderation
Ag8n "Do NOT use standard, off the shelf strips, for food/drug applications. There are special tracibility and accuracy requirements. Normally, a coupl..." | Read more » about 1 year ago
Ag8n "Now, to change the topic a little bit. What happens once all this testing gets going? In industry, a financial auditor appears and says " you are..." | Read more » over 1 year ago
Ag8n "There are variations on the method, but check out the USP if using for medical applications. The oldest is a straight " gel clot". The sample is ..." | Read more » over 1 year ago
Ag8n "In case this work is not successful and the mining continues, how can you minimize the damage done by the mining? " | Read more » over 1 year ago
Ag8n ""Pharmacopeia online" is at " uspbpep.com". " | Read more » over 1 year ago
Ag8n "The Wikipedia article is an interesting read. The initial data said horseshoe crab mortality from L.A.L. testing should be about 3%. However, rec..." | Read more » over 1 year ago
Ag8n "Here's where life gets a bit interesting. There are substances called pyrogens. These cause a fever, sometimes severe, even if the carrier bacteri..." | Read more » over 1 year ago
Ag8n "As a refresher, read USP 31, <1231>"Water for Pharmaceutical Purposes". This is available, for free, from Pharmacopeia online, as mentioned ..." | Read more » over 1 year ago
Ag8n "Error here. It should not be objective c, as noted above. It should be some plastics are showing higher extractables than bulk water. Something..." | Read more » over 1 year ago
Ag8n "Getting a hold of the USP used to be difficult and expensive. While current USP may still be expensive, here is a source for older versions. "Pha..." | Read more » over 1 year ago
Ag8n "USP/BP/EP means United States Pharmacopoeia,BP is British Pharmacopoeia, and EP is European Pharmacopoeia. Sections of the USP are divided into mo..." | Read more » over 1 year ago
Ag8n "The CO2 produced can be measured several ways. Each method has advantages and disadvantages and depends on the final use of the instrument. For exa..." | Read more » over 1 year ago
Ag8n "If you want an overview of TOC, Wikipedia is a good start. The current article seems pretty thorough ( dated 19 July 2022 by 75.143.92.215). Any c..." | Read more » over 1 year ago
Ag8n "Previous methods could be somewhat hazardous. To give an example, ammonia related chemicals often work their way into drug compounds. It can be f..." | Read more » over 1 year ago
Ag8n "Going back over this. We did a lot of work with total organic carbon (TOC). According to Dr. Paul Whitehead at egalabwater.com (the blog title is..." | Read more » over 1 year ago
Ag8n "Very impressive! Which plastic lens did you use? The one from the computer drive or the one from a laser pointer? Thank you!! " | Read more » almost 2 years ago
Ag8n "Interesting. We would do some of the individual tests, for example oil and grease. These were only done for a short period of time ( a year or tw..." | Read more » almost 2 years ago
Ag8n "Found another good example. It's from six years ago on the PBS series "Gross science". The title on youtube is "See microbes with this DIY phone ..." | Read more » almost 2 years ago
Ag8n "Very helpful video on the lens removal. Thank you. " | Read more » almost 2 years ago
Ag8n "Yes, that did it! Thank you very much. Only did a quick once over of the diagrams. It looks like they take the focusing lenses out of a CD drive ..." | Read more » almost 2 years ago
Ag8n "Having trouble with the "digital manual of construction in spanish". For whatever reason, the link doesn't work here. Could you please post the i..." | Read more » almost 2 years ago
Ag8n "The conductivity cell should take the place of Rx. So disconnect the conductivity cell, disconnect Rx, leave the one of the conductivity cell conn..." | Read more » about 2 years ago
Ag8n "Further note-EC is electrical conductivity " | Read more » about 2 years ago
Ag8n "Especially in mixtures, not all soluble solids are conductive. So yes, you can dissolve (or sometimes suspend) something inert in water. We would..." | Read more » about 2 years ago