I'm a little confuse with the magnesium part of this test kit. For both the Ca and Alk, one would titrate the sample water until the color in the container turns completely to the end color. This is easy. However, on the Magnesium instruction, it is less obvious. From what I understand, you titrate with the mag reagent drop by drop until you see "THE FIRST" glimpse of the color change? This is the measurement that you want? Basically, the color would give a hint of turning from pink to blue but that's it. It quickly turns back to pink. If this is the correct method, then this test is pretty useless since it is very hard to detect that subtle change in color.
Now, if I go all the way and titrate until the color in the bottle complete turns blue, I would have used up too much reagent according to the instruction. At the level, my mag would be 1600+ which I think is incorrect as I don't dose and use basic IO salt.
any input from owner of this kit?
Now, if I go all the way and titrate until the color in the bottle complete turns blue, I would have used up too much reagent according to the instruction. At the level, my mag would be 1600+ which I think is incorrect as I don't dose and use basic IO salt.
any input from owner of this kit?