Question on using Taylor K-2006C test

[Jerryxe]

Hi,

I got a box of Taylor K-2006C test kit from pool builder (for my new pool). When I start to use it to test FC and CC (FAS-DPD), I got confused with the instructions.

The instruction says, if 1 drop = 0.2 ppm, I should use 25mL sample, and if 1 drop = 0.5 ppm, I should use 10mL sample. I assume it refers to the R-0871 reagent.

But there is no where says if my R-0871 reagent is 1 drop = 0.2 ppm or 0.5 ppm. (The R-0871 bottle is 2oz size), even the test kit box lable just says 1 drop = 0.2 or 0.5 ppm.

How do I know if my reagent is 1 drop = 0.2 ppm or 0.5 ppm, so I could choose the correct sample size (10mL or 25mL)?

Thanks!

 

[pjt]

How do I know if my reagent is 1 drop = 0.2 ppm or 0.5 ppm, so I could choose the correct sample size (10mL or 25mL)?

The precision of the test (0.2 or 0.5) depends on the volume of the pool water sample.

Use a 10 ml sample of pool water. Each drop of R-0871 will be 0.5 FC. There's no need for 0.2 FC precision, and you'll save time and reagents.

Get a SpeedStir if you don't already have one.

 

[Jerryxe]

The precision of the test (0.2 or 0.5) depends on the volume of the pool water sample.

Use a 10 ml sample of pool water. Each drop of R-0871 will be 0.5 FC. There's no need for 0.2 FC precision, and you'll save time and reagents.

Get a SpeedStir if you don't already have one.

Ok, now I got it. So it basically means if I use 10 mL, each drop counts 0.5 ppm.

My initial thought is that different bottle has different 0.x ppm (I thought maybe drop size? hmmm), so I need to choose the right one.

Thanks for the explanation, and all make sense now.

And yes, I have a SpeedStir, works perfectly

 

[AUSpool]

Yeh, a 10ml sample, 1 scoop of the r0870 works just fine, then each drop of r0871 = 0.5ppm FC.

The instructions say 2 scoops but I’ve only ever used one. If you use 2 scoops in a 25ml sample, one in a 10ml sample makes sense. If it turns pink you’re good.

I don’t always test for CC’s but if you do use the sample from above (your treated FC sample) and add 5 drops of the r0003. If it turns pink again there are CC’s in the sample. Then use the r0871 again @ 1 drop =0.5ppm CC’s. Ideally CC’s should be low to very low if everything is good.

 

[jimbethesda]

Wow! A pool builder that gave you a Taylor K-2006? Sounds like you picked a good one.

 

[AUSpool]

And a couple of notes for using your new kit.

Store it in a cool dry spot like a laundry cupboard. Never leave it outside, I bring my samples inside to run the tests. Apart from the CyA. CyA outside, pH in front of a white background.

Dry your hands and the sample tube or comparator before running a test. The r0870 in particular doesn’t like moisture. And you can only use one of the r0870 at a time so I vacuum sealed my second with some desiccant sachets until I need it.

Rinsing is important. I rinse 3 times from surface water discarding away from where I am. Then invert, and plunge down to elbow depth for the sample. Run the test. Record the result. Then rinse 3 times in tap water and dry.