Ignition Residue & Ash Determination Instrument

The constant-weight decision is executed automatically against a 0.3 mg threshold, with cooling temperature, dwell time and weighing humidity all under programme control — removing human judgement. Samples stay inside the sealed chamber, insulated from lab temperature, humidity and dust, so within-batch and between-batch consistency beats manual operation.

The furnace covers ambient to 1000 °C and ships with 10 mL quartz crucibles; corundum and ceramic crucibles are optional and other capacities can be made to order. If your method needs a higher temperature or a special atmosphere, note it in your URS and we will evaluate furnace lining and sealing options.

The ignite–cool–weigh loop is fully automatic; the acid addition step can be performed inside the instrument using the optional sulfuric acid dosing unit, avoiding operator contact with strong acid and reducing transfers. The exact sequence can be configured into the software method to match your SOP.

Pharmacopoeias and GB methods usually define constant weight as a difference of no more than 0.3 mg between two consecutive weighings (a few standards use 0.5 mg or 0.2 mg). The instrument judges at ≤0.3 mg by default, which covers most pharmacopoeia and food-contact methods; if your standard specifies another criterion, confirm applicability with an engineer before ordering.

No. Overall migration is the total non-volatile substance transferred from a food-contact material under a specified simulant and contact condition; evaporation residue is the mass left after the soak or extract solution is taken to dryness; non-volatile matter refers specifically to the fraction that does not volatilise at that temperature. Their sample preparation and simulants differ, but all three end with evaporation, drying and constant-weight weighing, so one constant-weight tester serves them all.

They are not equivalent. Loss on drying is everything the sample loses at the specified temperature — water, residual solvent and other volatile components; water content means H₂O specifically and is usually determined by Karl Fischer titration or a dedicated moisture analyser. The two figures approach each other only when water is the sole volatile present. A compliance report should state the method and conditions for each.

The four differ in temperature, duration and preparation, but all end in the same high-temperature ignition, cooling and constant-weight weighing step, so one high-temperature instrument covers them. Ignition residue is the inorganic residue left after high-temperature ignition; ash is what remains after food, pharmaceutical or herbal material is ignited at a specified temperature; acid-insoluble ash treats the ash further with acid and keeps only the insoluble part, to reveal sand and other extraneous matter; loss on ignition (LOI) is the mass percentage lost by solid waste, building materials or minerals at high temperature.

Yes. Standard models ship as-is, while chamber count, specimen size, fixtures, temperature range and software modules (including the GMP Computerized System module) can be tailored to your SOP and URS. IQ/OQ/PQ validation documentation packages are available.

Standard models usually ship in 4–8 weeks; customised builds depend on the agreed scope. Instruments are packed in export wooden cases and can move by sea, air or rail. We supply proforma invoice, packing list and certificate of origin (CO / Form E), and work under EXW, FOB, CIF or DAP terms.

We provide remote installation guidance, bilingual (Chinese/English) manuals and video training; on-site commissioning by our engineers is available. Users can self-calibrate with standard weights, reference films or calibrated leak standards, and third-party calibration certificates can be supplied.

The instrument carries a 12-month warranty from acceptance plus lifetime maintenance support. Consumables (molecular sieve, desiccant, sealing grease, printer paper) are kept in long-term stock, and key components are international brands available worldwide. We respond to technical enquiries within 24 hours.

Yes. Every instrument lists its applicable standards on the specification page (ASTM, ISO, GB, YBB, Chinese Pharmacopoeia, USP, EP, JIS, DIN, TAPPI and more). The software outputs raw records and reports suitable for audit trails, with an optional GMP / FDA 21 CFR Part 11 compliance module.

The software ships with Chinese and English interfaces; other languages can be added on request. Data export is available over RS232, USB, Ethernet or Wi-Fi, and reports can be exported to Excel, PDF or structured files for LIMS integration.