pippo

Thanks. I need to mess around with this more and see if theres a way around it........Who knows, maybe sequence of addition may matter.

Thanks, sensei. Note that the solution is bad even before I added the weak sulfuric acid. So whatever problems there are were there to begin with. I just tried the H2SO4 for the sake of it realizing I have nothing to lose. So, how are some manufacturers doing this? What's the chemistry "secret"?

People, Mixing in DI water Calcium nitrate tetrahydrate, K Phos Monobasic, and Mg Sulfate, about 2% each. I am not sure if it is the sulfates or the phosphate that causes solution to get cloudy with ppt. Tried also to lower pH from initial 3.8 to 3 or so with dil sulfuric. Any one know what is causing the cloudiness? I still have to add KNO3 and K2SO4 in even smaller qtys but I stopped here as no need to proceed with a bad/turbid solution Tips appreciated.

Right- because, lately, is seems you are the only one who understands everything. Your smugness is too obvious, and evident that perhaps you need to get a life(?), Im not sure- just suspect. I killed NO wildlife, which you stated I did by your post. Just pesty spider mites. I have no more to say about this thread, and certainly will not continue to tit for tat with a member with such evidently low self esteem that he needs to berate/belittle fellow members on multiple threads (including my other one on mercury. ) Now, I have organic product to sell.........

Update: Look, forget about the nonsense about my product being "organic", as in "organic" food. If I did not explain clearly, my fault. It is NOT food. Also, to get to the chase without the back/forth about lectured on "morals", and "fraud", etc, no one is defauding anyone. You guys have no idea what Im growing, so suffice it to say it is irrelevant. I used permethrins on a partial crop, and GC tested out NEGATIVE. So, all the hype/predictions were for nothing, not to mention wrong. Just wantedf to post results of my testing/experiment on permethrins. The chemist at this lab said it this way-"they basically evaporate within 2-3 days. Looks like he was right. Product came out non detectable on GC.

Wow, good idea, John! Relatively clean operation, I think, too. Now, when you say ppt the Hg, will one actually see the liquid metal? Could I simply use excess of NaOH? Like, 1N NaOH in excess? thanks.

Thanks, pavel. I am an experienced chemist. Just wasnt sure of the reaction. Was hoping to just add nitric. Deal with toxic stuff every day. But your advice is still good. I dont think this is worth the mess.

People, Have some Mercuric chloride and want to convert to the mercuric nitrate, if possible/practical. Can leave it in aqueous solution as a 1Normal strength- do not need to have a crystalized nitrate. Any advice appreciated. (I have converted Be chloride to the nitrate in the past by boiling/reduction, with continual addition of excess nitric....) Thanks.

Thanks, people, for the imput. But if it's "gone", it's not there, so it's not dishonest, not that the subject of morals/"honesty" are even an issue- we're talking about a chemical being there or not. Apparently, based on the dialogue here, consensus appears to be permethrin doesnt "disappear". Therefore, I will NOT use it.

Right- it is not permitted for this particular crop item. BUT, thats why I was trying to get a handle on test results. I mean, heck- if it's gone (broken down/oxidized to an ineffective pesticide, etc) they shouldnt care, and it will pass as permethrin free. Dont mean to beat the subject to death, just trying to understand exactly what a GC will detect if it IS broken down. Maybe I shoyuld actually speak with the GC guy at the lab- I could find out which lab is contracted to do this test.......... Thnaks for your imput, John.

has nothing to do with lying. Some pesticides believe it or not are allowed in some organic farming circles- dont want to get it deep with that now, but the pesticides they allow arent even tested for. So, as far as the "organic" marketing hype which is at a fever pitch right now they dictate what is "organic". It's all a hypocrisy. But I appreciate your imput, John. Much to think about. good point.

As always, thanks, John. Good point on cis/trans. My only curiosity is in pesticide residue concerns if a pesticide is "oxidized" by atmospheric oxygen (air) or even light of the right intensity (guess sunlight would be the most "powerful") and therefore the effect of that pesticide to be rendered useless/inactive, why would the GC test come up showing results as positive for say, permethrin? (this is all leading to organic farming products having been exposed to permethrin, and after, being tested for permethrin residue. If the permethrin had become ineffective/useless/inactive, why would the ag product be stigmatized as having permethrin residue if it isnt even there as an effective "toxin"?)

Merck Index says it is an ester, but IUPAC says it's a carboxylate. Which is more accurate? Bigger question is, let's say a GC lab tests for Permtethrin- it calibrates the GC with a standard, then tests the sample for permethrin. Permethrin does not last long in the atmosphere/nature- I understand it oxidizes/"degrades". Will the degraded form show up in the GC test as "active" permethrin? Anybody know? Thanks

I know 145 is nothing. Thats why Im just 145. I am "light framed". Are you "stocky"? My belly blubber may account for say, 2-3 lbs. Im considering quitting my favorite Northern germany Pilzn beer.