Precision Labs Nitrate and Nitrite test strips measure results as nitrite and nitrate ions, not as nitrogen content (commonly referred to as nitrite-nitrogen and nitrate-nitrogen). It is important to know which result to report. Agricultural [...]
No. The Phosphate test strip uses the Molybdenum Blue method and detects only orthophosphates. Tripolyphosphates must be converted to orthophosphate first to be detected. This can be accomplished by treating the sample with acid first, and [...]
The pad for reading the results is the one at the bottom of the channel or well. When laid on a table with the “bump” facing up, it is the pad you can see. This [...]
There are some interferences to consider: Arsenate and silicates above 20 ppm will cause a false reaction. These will form a yellow color. Fluoride, chlorides, and nitrites above 50 ppm will depress the phosphate reaction [...]
The Phosphate test strip is measuring phosphate (as phosphorous) in ppm. We do not offer a strip that can read as low as ppb.
Hardness is mostly expressed in ppm (mg/l as CaCO3) or in German degrees (°d). There are also other units used for the expression of hardness, and the conversions are presented below. Water Hardness Conversion Table [...]
The reaction of the Fluoride test strip is very dependent upon the acidity level of the solution to be tested. Before testing, the solution has to be acidified to a pH ≤ 0.5. For acidification, [...]
The solution to be tested must be at a pH of 0.5 in order for this test to be accurate. This pH measure can be accomplished using concentrated Hydrochloric acid (muriatic acid) to acidify the [...]