Australia's Science Forum

Has anyone used glass filter crucibles with a Guko sleeve. We used Buchner funnels for the analysing the sulphur content of lawn food prac in year 12 Chem but this isn't 100% successful and we are looking to use sinctured glass filters instead.
As we have to purchase all the gear I was wondering if others have used this equipment and how successful it is.
Any feedback greatly appreciated.
Dee

Dee, we had this problem on the forum just before last holidays.
The prac you are talking about is messy and hard to filter, because the particles are very tiny. Our HD has a nifty prac for determining S in fertiliser using titration method. It is very successful with our students. If you like, give me your fax number and I will fax it to you, before you spend money on the new set up.
Lada

Thanks for that
My fax no. is 43323443 Attention Deidre Day
I greatly appreciate the help
Dee

Hi Lada

Could I please trouble you for a copy of this prac. as well. We also looked into sinctured filters but decided against them. A prac. that works for this topic would be great. Fax 02 9634 6184 Att. Trudy Lewis

Mnay thanks
Trudy

Hi Lada,

Very interested in copy of your filtration prac also,

Fax 02 67420188. Also have lots of problems with the filtering

Thanks
Chris Howarth
St Marys College Gunnedah

Hi all,
We finally bit the bullet earlier this year, and bought new crucibles. After shopping around, the best deal I got was from Science Supply Australia. Sintered glass crucibles were $30.36, and the rubber gaskets to go with them were $5.65. Had great success this year with nearly 100% accuracy! HD insisted on doing this prac this way, as they get to do titrations later on.
Regards, Ellice.

Dee, could not get the fax through. Did you give me right number?
Chris and Trudy, you should have it now.
Lada

Thanks Lada

All received. Teacher will be really pleased.

Regards Trudy

Lada,
I'd also appreciate a copy of the prac. My fax number is 02 67711979; Attn Liz.
Thanks,
Liz

May I join the list, and appreciate a copy also,

attn Sue Science 02 9823 7662

And Thank you

Hi, we used the cintered crucibles with success this year but I would be interested in the prac that you used. My fax number is 66 726 056 attention Estelle in Science
Thanks Estelle

Hi Lada, Many thanks indeed for the fax.
Received just fine.

Thank you

Hi Lada
Sorry to trouble you but could I get a copy as well.
My Fax Number is 43931157 Attention Mary.
Thank you
Mary

We use a drying oven at present for this prac but would also like a copy of the prac
02 9545 1547
Thank you
Julie

Dear Lada,

Received fax, everyone very pleased hope to give it a trial run soon.

Regards
Chris

Hi Lada
Yep, I made a typo with the fax number and I haven't been in since last Wednesday so just got message.
Correct fax number is 02 43323543
ooops, sorry about that!!!!!!!
Looking forward to getting the prac, but we decided to order one set of equipment anyway, just to try it out and if any good we will put in the budget for additional sets next year. Being only seniors we can justify the expense a bit more, due to larger numbers of kids doing the pracs.

Thanks Dee

Thanks Lada
I have received the fax and we are going to do a run through with it to see how it goes. Year 12 on exams at moment so have a bit more time to play around with pracs.
Thanks once again
Dee

Hi there,

Its been ages since I have been able to spare the time to see what was going on in Chemtalk. I have just been going through some of the topics and the filtration one especiallly. We are a yr 11/12 college and also do the analysis of sulphur in lawn fertilizer using the buchner funnels but it has never been a success. I was wondering if Lada could fax me a copy of the prac using the titration mehod. (Ref August 14th 2007)Also Ellice, if you could send me a copy of the prac using the sintered discs (ref Aug 15th 2007) and any information you have about the process would be great. My fax no is 03 232440.

Thanks Tried to do a smile but didn't work.

Kerry