This manual introduces the use of the calcium magnesium test kit
The document provides instructions for using the Hanna Instruments HI 38080 Calcium and Magnesium Test Kit. It details the contents of the kit, including buffer solution, indicator, EDTA solution, and various pipettes and vessels required for analysis.
The manual explains the significance of calcium and magnesium in soil plant nutrition and describes the chemical reaction involved in the titrimetric method. It provides step-by-step instructions for preparing a Mehlich extract from soil samples, performing the titration to determine the endpoint color change, and calculating the final concentration.
| Range | > 0 meq/100 g |
|---|---|
| Smallest Increment | 1.5 meq/100 g |
| Analysis Method | Titration |
| Sample Size | 4.0 mL |
| Number of Tests | 100 (average) |
Calculate meq/100 g by multiplying the number of drops of titrant by 1.5.
The solution turns pure blue, changing from wine red to purple.