NurdRage - 2012-06-29
In this video we're going to test for lead using the potassium rhodizonate we made in a previous video. Warning: Lead is neurotoxic, wear gloves when handling anything suspected to contain it. Dissolve as much as possible of 0.3g of potassium rhodizonate in 100 mL of 5% acetic acid solution. Apply this solution to absorbent paper and rub it onto the item to be tested for lead. A violent, purple, or brown color is strong indication of lead.
Dude, your videos are awesome! You should do one about fireworks for the fourth.
Happy of having helped you! I've worked on ICP OES for a month and a half during an internship, so as soon as you spoke of water and soil analysis for lead, I immediately thought of ICP-OES. By the way, if I may ask, what are you working on with those water and soil samples?
Would have loved to enter but I'm no good at VFX. I'm very excited to see the entry you choose though! :D
thank you for this very important video.. i can use this for my science investigatory project :D
hope you can help more students like me/.
Commercial lead test kits often contain that soulution. Labs are expensive!
I looked into ICP-OES and it costs half as much as ICP_MS! I'll definitely be using this method from now on to analyze my samples for heavy metals. thank you so much, you've just cut my research costs in half
I've missed this channel, almost forgot about it
could you make a video in wich you show how to separate tin from lead from the solder? then in how to make tin (II) chloride- it will be usefull for the precious metal test... thankyou.
I really like your videos! Keep them up!
At my local Home depot, I saw a huge spool just like the one he has in this video, it was near the torches and propane cylinder(for torches) area.
That solder that you used in the video, where did you order it from? It's electronic solder, and I need a big spool like that but I can't find anything that size. D:
where do you get all of your chemicals from?
I see you turned out fine.
When I was an intern in electronics I used to chew solder. Then I discovered it had a lot of lead in it and I was like: woopsie!
I would have to know a lot more about your application in order to give any advice. The very crude test in the video is good enough for the simple work an amateur chemist would do, but totally useless for testing drinking water or human blood. Atomic absorption spectroscopy might help you, but that can only detect one element at a time while ICP-MS can do many.
Can this be used to test lead solutions and create standard curves?
dude, that cracked me up xD
Can you do a video in how to test if there is fluoride in water?
The Akward moment when the guy behind the voice is your chemistry teacher.
Back in uni I think we made some grams of PbI that was used in yellow paints (it's a yellow solid) Maybe because of the iodine. Dunno though.
This is very girly, but I've been wanting to test some red lipsticks for lead, but I don't think I could use this method.
Couldn't you use lead to test for potassium rhodizonate?
wow Just checked the prices maybe you are right I will make my own Cheers
Everyone seems to have their own way of saying it. When i said it one way, people complained the other way, and when it said it that way, people complained otherwise.
You scared the shit out of me! haha You said lead and I thought of tin! I do tin art almost everyday. I manipulate it without gloves. Wow what a shock. Tin is also a dangerous metal isn't it? But not as much as lead?
can you do a video on how to test for presence of silver
Firstly, it's called Glacial Acetic Acid Secondly, it's moderately cheaper to make it yourself. All you have to do is set up for simple distillation with Sulphuric Acid and Sodium Acetate. (or the more common way is sodium acetate with sodium bisulphate as it yields the same product while cutting costs on the valuable sulphuric acid.)
That's more physics than chemistry.
I was using my bare hands, but I washed them after that class.
Does it react with lead chromate?
Perhaps if you wait till the paint dries it will show up if you rub it?
needs more fire
if you look through the back of the paper (i didn't show it) it's still yellow.
uploaded on my birthday -SUPER THUMBS UP-
I love your vids man.
The problem can be the existence of interferences of another ions O.o
next we test... my drinking water! :)
Awesome
what was the minimum concentration of Pb you were able to detect using this compound? most commercial lead testing kits have a minimum detection threshold of ~100ppm and give false positives very frequently. would you recommend this method to somebody sampling primarily environmental water and soil samples?
Can I ask why you used n-BuLi and not a more common and more useful compound?
In Ontario where can i buy the glacial (100%) acetic acid?
I get too many of those, one of the reasons why i dont make vids as often
The main objection, and I say this an English man, is the loss of the L that seems to come with the American pronunciation!
if I remember right, they used this method in doctor house.
although i don't conshider myshelf a nerd, i like to watsh these videosh on a perfectly shunny day.:)
pls giv a equation for that reaction making lead rhodizonate
But when I was a kid I used to think a compound was made of dry material and a chemical was made of a liquid.... Now I think a compound can be made of two or more chemicals (either a liquid or solid) but the components of these compounds can be chemically separated? Does that make sense or am I talking crap? Ian.
It's hard to find when you don't live near large cities, or don't know the cities very well. D:
Thanks I live In the Hammer. This will help
NurdRage - 2012-06-29
I'm always first, get over it. ^_^ Anyway, the channel/logo redesign contest is still going, i'm still waiting on a few people that have asked for extensions. We'll vote on the best ones in a couple of weeks. Since the branding card will be in use for at least a year or more it had better be good. :)