Ok so today tests are as follow only thing I changed was inverting the cuvette when mixing the reagent
1st test 28ppb sounds great right ? No
2nd test 91ppb
3rd test 93 ppb
So then I grabbed another vial that was full of rodi wiped down with a micro fibre cloth and retested the 3rd test vial which came out at 76ppb
lost completely here! new fresh vials come tomorrow hopefully this will solve the issues I’m having as my cuvette did come with some scratches straight from the box when new from Hanna
I’m guessing the po4 is is between 91 - 93ppb but the other readings concern me as the variance is so large
As stated my test procedure is the same each time as per instructions each time using a separate syringe for tank water and separate syringe for rinsing the cuvette with rodi
1st test 28ppb sounds great right ? No
2nd test 91ppb
3rd test 93 ppb
So then I grabbed another vial that was full of rodi wiped down with a micro fibre cloth and retested the 3rd test vial which came out at 76ppb
lost completely here! new fresh vials come tomorrow hopefully this will solve the issues I’m having as my cuvette did come with some scratches straight from the box when new from Hanna
I’m guessing the po4 is is between 91 - 93ppb but the other readings concern me as the variance is so large
As stated my test procedure is the same each time as per instructions each time using a separate syringe for tank water and separate syringe for rinsing the cuvette with rodi