PAM jar testing is a controlled screening step, not a miniature guarantee of plant performance. Its value comes from comparing identified candidates under repeatable conditions and carrying the useful evidence into a properly scoped equipment trial.
Make the sample relevant
Record where and when the sample was collected and the production conditions it represents. Consider the effect of storage and transport. Include relevant variation without combining incompatible streams into an artificial average that the plant never actually treats.
Control the preparation and sequence
Use labelled products, product-specific preparation instructions and a stated dose basis. Keep solution age, mixing sequence and observation time consistent. Include the untreated feed and incumbent where appropriate. Record coagulant conditions separately rather than changing several chemicals and attributing the result to polymer alone.
Request screening information from Xinqi Polymer. The anionic and cationic families offer different starting points, but the sample and separation duty determine which candidates deserve further work.
Judge more than appearance
Observe clarified liquid, settling or drainage behaviour and the volume and handling of the solids. Use a method appropriate to the intended equipment; settling observations alone do not establish flotation performance. Keep unsuccessful doses in the record so the operating window remains visible.
Define the next decision
Advance candidates that show repeatable performance over a useful range. Confirm preparation capacity, injection and full-scale mixing during the plant trial. Retain the laboratory record as screening evidence, with its limitations stated, instead of presenting its best result as a guaranteed full-scale saving.