Define the operating question
State the water source, supplier qualification and RFQ data, target measurement and downstream separation step.
A product name alone cannot define a responsible treatment recommendation.
Characterize representative water
Record turbidity, color or target contaminant, alkalinity, pH, temperature and credible variability.
Use actual operating water rather than one convenient synthetic sample.
Normalize product and dose
Compare candidates on the same active aluminum or Al2O3 basis and document stock preparation.
Neat product units can hide differences between liquid and powder grades.
Reproduce mixing and time
Keep addition order, rapid mix, flocculation energy and settling time consistent.
A strong beaker result obtained with unrealistic mixing may not scale to the plant.
Measure the complete result
Track settled turbidity, pH, floc behavior and the application-specific analytical target.
Include sludge or filtration consequences where they control operating cost.
Release a bounded window
Link water, product code, lot, dose basis, mixing, measurements, COA, SDS and quotation.
Revalidate meaningful water, process or supplied-product changes.
Diagnose failure modes
Separate raw-water change, product identity, pump delivery, pH, rapid mixing, floc breakage and clarification loading.
Change one factor at a time when operations allow and preserve the baseline.
Close the purchasing record
State sample and trial quantity, monthly demand, packaging, destination, document needs and receiving checks.
The approved sample and production supply must remain traceable.
Connect the approved sample to supply
A useful PAC RFQ begins with the treatment duty. State drinking-water or industrial-wastewater service, raw-water analysis, normal and difficult ranges, current coagulant, feed point, mixing, separator type and required treated-water measurement. Include temperature, pH and alkalinity because they strongly shape the screening plan. Do not request a universal dose without the water and process context needed to test it.
Ask the supplier to identify each proposed grade by product code, liquid or powder form, active Al2O3 basis, basicity method and relevant quality limits. Request a current COA and SDS, preparation or storage guidance and the proposed sample quantity. If several grades are offered, require a reason for each candidate and a manageable jar-test sequence.
Separate laboratory, field-trial and commercial quantities. State the test schedule, destination, monthly demand, packaging, pallet or marking needs and required export documents. Define acceptance measurements and the incumbent reference before comparing quotations. Delivered cost should be normalized for active basis, expected dose, handling, alkalinity correction, sludge and downstream performance.
Preserve traceability from sample to repeat order. The approved sample code, test report, quotation, purchase order, production lot and receiving check should remain connected. Require disclosure of material specification or formulation changes and define when revalidation is necessary. A complete RFQ gives technical sales enough evidence to propose a bounded sample path and gives purchasing a defensible basis for comparing supply.
Ask technical and commercial questions in the same document but keep their acceptance criteria separate. Technical approval should identify the tested water and result; commercial approval should identify price basis, Incoterm, lead time, packaging and document set. This prevents the lowest quoted unit price from silently substituting a different concentration, grade or logistics basis for the sample that actually passed the treatment test.