An EC or pH number has little procurement value unless the sample identity, extraction method, water, calibration, temperature and acceptance range are recorded with it.
1. Write the method before testing
Choose the laboratory or buyer method before samples are opened. Record the extraction ratio, water specification, mixing time, settling time, filtration approach and measurement temperature. Do not merge results from different methods into one acceptance table.
2. Build a representative sample
Select plugs from multiple positions in the received package and identify the shipment, model and sample date. If replicates are combined, document how; if tested separately, retain every result rather than only the preferred value.
3. Calibrate and document instruments
Follow the meter manufacturer's calibration instructions and record buffer or standard information. Rinse probes as required and note temperature compensation settings. A result without a calibration record is difficult to audit later.
4. Record results with context
Report each replicate, the average if appropriate, the test method and any unusual observation such as incomplete wetting or visible contamination. Compare supplier and buyer data only when the methods are sufficiently aligned.
5. Set project acceptance criteria
Acceptance limits should come from the crop program, buyer specification and agreed test method. MCCS current-batch information can be requested after the formulation and test scope are confirmed; the approved quotation or batch specification should carry the final requirement.
Buyer evaluation matrix
| Record field | Why it matters | Example entry type |
|---|---|---|
| Sample identity | Links the number to the material tested | Model, lot and received date |
| Extraction method | Makes results comparable | Ratio, water and timing |
| Calibration | Supports instrument confidence | Standard and calibration time |
| Replicates | Shows variation | Individual results and summary |
| Acceptance range | Creates a procurement decision | Buyer-approved limit and method |
Send the crop or application, tray dimensions, current workflow, destination, expected volume range and required evidence with the inquiry. MCCS sales can then discuss a relevant sample route without changing protected product specifications.