Taylor CYA test and Standard

[dave6187]

Hey everyone,

I recently got a bottle of the R-7065 50ppm CYA standard because I wanted to compare my accuracy with a known thing. I'm having trouble though, because when I use the standard, mix 7ml of the R-7065 with 7ml of R-0013, and try to test it I get 100ppm. No matter what light I'm in, how i'm looking, where it's at. Once the level goes past 90ppm the dot is GONE.

Meanwhile when I test my pool water, using the same manner, the dot dissapears between the 40 and 50ppm mark, telling me that my pool should be at 50ppm.

Unless i'm doing something wrong, which is entirely possible, it really seems like the standard isn't mixed correctly and needed to be diluted by half.

any input?

thanks!

 

[PoolStored]

Mix the standard 7ml, and 7ml of R-0013. Shake. Fill the tube with this solution to the 50 line in the CYA view tube.

That is what the CYA test should look like when you reach the end point. (Test End).

 

[wireform]

It may depend which tube they're using can have different outcome. My kit has a 15/15 bottle with a matching tube. The newer kits come with a smaller set I think.

 

[Rocket J Squirrel]

Mix the standard 7ml, and 7ml of tap or distilled water. Shake. Fill the tube with this solution to the 50 line in the CYA view tube.

That is what the CYA test should look like when you reach the end point. (Test End).

No. The standard is used in place of pool water. Mixing it 50-50 with R13 is correct.

 

[PoolStored]

No. The standard is used in place of pool water. Mixing it 50-50 with R13 is correct.

You are correct sir..I corrected. Thank you! What I meant, not what I typed.

 

[Rocket J Squirrel]

I recently got a bottle of the R-7065 50ppm CYA standard because I wanted to compare my accuracy with a known thing. I'm having trouble though, because when I use the standard, mix 7ml of the R-7065 with 7ml of R-0013, and try to test it I get 100ppm. No matter what light I'm in, how i'm looking, where it's at. Once the level goes past 90ppm the dot is GONE.

Meanwhile when I test my pool water, using the same manner, the dot dissapears between the 40 and 50ppm mark, telling me that my pool should be at 50ppm.

I have had issues with the standard solutions as well. Several years ago, I bought all the standards, and none of them tested as expected! I trusted my fresh Taylor reagents more than the standards and wrote off the standards as expired or polluted.

This past year, I tried again, with just the CYA standard. In full bright sun, it indeed tested at 50. None of this "back to the sun and glance" stuff needed. So I think there is variance in the quality of the standard solutions.

 

[mc2021]

I also used the standard last year and could easily see the dot at 50 so I thought that was what it was supposed to look like. In reality it was probably 30 or 40 and I've thought my cya was actually higher than it actually was. Watch the Taylor test video.

 

[dave6187]

Most of the issues I see with this test are reading lower than it is, including using the standard. But this standard is 100% testing at 100ppm. Once it's past 100, the dot is GONE. Adding any more solution to the tube changes nothing because I already can't see the dot...

I reached out to Taylor support on it, curious what they end up saying

 

[Bperry]

Most of the issues I see with this test are reading lower than it is, including using the standard. But this standard is 100% testing at 100ppm. Once it's past 100, the dot is GONE. Adding any more solution to the tube changes nothing because I already can't see the dot...

I reached out to Taylor support on it, curious what they end up saying

So you diluted it with the r13 and it still reads double?

 

[Newdude]

So I think there is variance in the quality of the standard solutions

So we need a standard solution because the standard solution isn't standard ? My head hurts.

 

[dave6187]

I contacted Taylor support and they checked the lot number of the standard that I have and are sending me a replacement, so I guess they did find something wrong with mine.

Kudos to them for being so supportive!