Finding phosphate levels with a Vernier colorimeter

[fibreweb]

We have recently received our new Vernier Lab Quest 2 with a colorimeter.

My Chem teacher had hoped to use it to test for Phosphate in the Water Quality in Yr 12 Chem but it seems I need Hach Phos Ver 3 phosphate powder pillows to use it.

I have never heard of these and can't seem to be able to find where I could get some in Australia and whether cost wise it is actually a viable proposition.

I have looked in our ancient stream watch kit to see if I could do anything with it but I cant work out how I could use those tablets instead.

Can anyone offer any help please.

Wendy

[linotas]

Contact John at Scientrific. He is very helpful and as they are the distributor for Vernier in Aus, they should know either how or where to source them.

[RosalieM]

We use pasco, but I made up my own solution of phosphate (20ppm) which the kids then dilute to get their base graphs. I can try to find the method and 'recipes' for you if you like. After that they test their water samples and read off the graph.

[DavidPeterson]

I have some as I used to use HACH colorimeters. I think I got it from Selby Biolabs but I'm not sure they exist anymore

We now use aquaspex microtest kits

[RosalieM]

Here is the phosphate test procedure we use. The website is

http://faculty.coloradomtn.edu/jeschofnig/drowned.htm

Hope it's useful to someone!

[DavidPeterson]

Try this site, click on more info and I guess they will contact you re: Hach PhosphVer pillows


https://www.thermofisher.com.au/goDirec ... g=cs&pgn=0


David

[lizzieb]

Wendy, try Laura at THS. They used to have some Hach pillows in Chemstore when I was there, but am not sure they are the same as what you're looking for...