Plan a trial for your application
Micronutrient stock solutions
Prepare a representative concentrate in actual irrigation water. Record pH, clarity on standing and soluble zinc.
Blended micronutrient fertilizers
Check the ligand and competing metal ions. At actual blend proportions, compare turbidity and precipitation.
Purchase specifications and incoming inspection
Include the intended grade or current specification in the enquiry. Use the table to compare selection criteria and inspection conditions. The specification agreed by both parties defines the contractual limits. Nouryon · Salt forms and grades of chelated micronutrients ↗
| Property | Unit | Published or agreed specification | Test conditions and checks |
|---|---|---|---|
| Chelated zinc | Mass fraction | Specify on an elemental Zn basis. | Report total zinc separately. Specify the analytical method and denominator used for the chelated fraction. |
| Total zinc | Mass fraction as Zn | Agree for the micronutrient grade supplied. | Record separately from water-soluble zinc and chelated zinc. |
| Solution operating conditions | pH range | Review the stated conditions of use for this grade. | Verify in the stock solution at the actual calcium concentration and with the other metals present. |
When approving a sample, record the grade, methods, limits and specification revision. On receipt, match the packing lot number to the lot-specific COA and record the measured values and release decision.
From samples to commercial delivery
Packaging and receiving
Show elemental zinc, ligand and lot on the label. For solutions calculate separately from net weight and elemental zinc concentration.
Storage and handling
Confirm storage and solution-delivery conditions for the offered grade. For long-term retention record moisture, seal and environment.
Sample and order lead times
State trial use, application season and latest warehouse receipt. Confirm MOQ, dispatch point and expected arrival for samples, initial orders and peak-season replenishment.
Questions from the plant
Why do products with equal declared zinc differ in solution stability?
Observe precipitation after mixing at actual water hardness, fertiliser concentration and pH.
Does a total zinc result prove EDTA chelation?
Request total zinc, chelated zinc and ligand identification methods. Match the reported sample to the bag label.
Report a delivery or batch issue
Include the order number, lot number from the package, label photos and inspection records for the affected lot. When retesting, check Total zinc, Chelated zinc, free ligand and applicable pH.
Request documents for your application
TDS · Technical data sheet
For grade selection and sample approval, specify the grade and revision required.
SDS · Safety data sheet
Specify the country or region of use and the required language.
COA · Certificate of analysis
Request a sample COA during supplier review. For incoming inspection, provide the actual lot number.