Soil analysis test procedures are not currently included with the kits. Contact CHEMetrics' Technical Services Department for information on soil analysis methods and references. No, CHEMetrics does not currently offer standard solutions. Because CHEMetrics' test kits are designed for use in a variety of industries, the acceptable test result for a given application is not always known. However, CHEMetrics' Technical Services staff is available to help analysts interpret test results.
Timing is very important in colorimetric chemistries.
Some chemistries will continue to develop color after the specified analysis time. The most accurate test results will be obtained when the reading is taken in the prescribed time frame.