R-7065 Standard CYA Solution?

[JohnH]

I need to order some more chems: R-0013, maybe some borate strips. But checking out the TFTestkits they also sell R-7065, R-7064, R-7063 Standard Solutions.

Questions
1) Are these worth having?

2) How do you use them?

3) What is the purpose for them?

Thanks, John

 

[jblizzle]

I think the CYA standard is good so you can confirm you are doing the test in the correct light. The others are not likely needed.

 

[svenpup]

The standards are a set level that you can test to check your reagents as well as to verify your testing methods. Since the CYA test is so subjective I recommend that one so you can train yourself what the vanishing dot should look like. The others probably aren't as useful.

 

[JohnH]

OK, GOOD. I will order some today.

Thanks, John

 

[duraleigh]

Confirming the above thoughts, our customers certainly agree. We sell FAR more of the R-7065 (CYA) than we do R-7064 (TA) or R-7063 (CH).

Most of that has to do with the CYA test being a bit hard to interpret and having that standard solution gives you a comparison.