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Key: test item, instrument name, total nonvolatile migration, gravimeter, moisture permeameter

Product

Integrated Dryer‑Ashing‑Weighing Workstation for Ignition Residue, Loss on Ignition & Ash Content

IRT-292 /362 -A
Focusing on packaging and material testing technology, we are committed to quality control in industries such as healthcare, pharmaceuticals, food, packaging, textiles, and new materials. Our products are widely used in enterprises, testing institutions, universities, and research institutes.

Category:

Constant Weight Analyzer

Ignition Residue and Ash Constant Weight

Integrated Dryer‑Ashing‑Weighing Workstation for Ignition Residue, Loss on Ignition & Ash Content

---IRT Series (Constant‑Weight Determination System)

Overview

The LabStone IRT Series Integrated Dryer‑Ashing‑Weighing Workstation is a professional laboratory system engineered specifically for ignition residue, loss on ignition (LOI), total ash, acid‑insoluble ash, and volatile matter determination.

Unlike conventional workflows that rely on separate muffle furnaces, drying ovens, desiccators, and manual weighing, the IRT Series integrates low‑temperature drying, high‑temperature ashing (up to 1000°C), controlled cooling, and precision weighing into a single, fully automated platform.

It is the instrument of choice for pharmaceutical QC, food and feed analysis, environmental solid waste testing, and chemical / materials characterization, wherever gravimetric ash and residue methods are required.

Core Applications

1. Ignition Residue & Loss on Ignition (LOI)

Determination of ignition residue and loss on ignition in pharmaceuticals, chemicals, polymers, and inorganic materials.

Fully compliant with Chinese Pharmacopoeia (ChP) requirements for residue on ignition and sulfated ash.

Automatic execution of the constant‑weight cycle (successive weighing difference ≤ 0.3mg).

2. Total Ash & Acid‑Insoluble Ash

Total ash determination in food, feed, cereals, starch, and plant‑derived materials.

Acid‑insoluble ash testing with optional sulfuric acid filling device to minimize operator exposure.

Applicable to coal, coke, carbon black, catalysts, and minerals.

3. Volatile Matter & Fixed Carbon

Volatile matter and fixed carbon analysis in coal, coke, carbonaceous materials, and biomass.

High‑temperature ashing with programmable ramp rates and inert‑gas atmosphere control.

Working Principle

Drying / Pre‑treatment: Samples are dried at controlled low temperature (≤ 150°C) to remove moisture.

High‑Temperature Ashing: Samples are transferred to the high‑temperature chamber (up to 1000°C) for complete combustion of organic matter.

Controlled Cooling: After ignition, crucibles are cooled in a water‑cooled chamber under a controlled atmosphere (compressed air or inert gas).

Precision Weighing: A METTLER TOLEDO analytical balance (0.1mg readability) performs automatic weighing.

Constant‑Weight Cycle: The system repeats drying / ignition / cooling / weighing until the constant‑weight criterion (≤ 0.3mg) is satisfied, then calculates and reports results.

Compliance Standards

ASTM Gravimetric Ash Methods

ISO Ash and Residue Determination Standards

ChP General Provisions: Constant‑weight definition and ignition residue methods

GB 5009.4 - Determination of ash in foods

GB/T 6438 - Determination of crude ash in feeds

YC/T 427 - Determination of ash in tobacco and tobacco products

GB 18484 / GB 18485 - Determination of ash and loss on ignition in solid waste

HJ 761 / HJ 1024 - Ash content of solid waste and sludge

CJJ/T 221 / CJJ 90 - Municipal solid waste analysis

GB/T 3780.10 - Carbon black - Ash content

GB/T 2295 / GB/T 7528 - Carbonaceous materials - Ash and volatile matter

GB/T 508 / GB/T 7531 - Petroleum products and synthetic resins - Ash / ignition residue

GB/T 9741 / GB/T 14837 - Chemical reagents and polymers - Ignition residue

GB/T 4324 / GB/T 23951 - Metals and inorganic compounds - Ash / LOI

GB/T 31984 - Industrial solid waste - Ash content

YB/T 5082 - Coke - Ash content

Key Features

Dual‑Zone Thermal Control: Integrated low‑temperature drying (≤ 150 °C) and high‑temperature ashing (up to 1000 °C) in one system.

Fully Automated Constant‑Weight: Automates the complete “dry / ignite / cool / weigh” cycle until ≤ 0.3 mg stability is achieved.

High Throughput: Up to 36 samples per run with dual‑balance configuration (IRT‑362‑A), ideal for contract laboratories and high‑volume QC.

Patented Balance Protection: Thermal isolation, moisture‑proofing, corrosion resistance, and fire‑retardant design safeguard the METTLER TOLEDO balance.

Safe Operation: Anti‑combustion and anti‑explosion design, over‑temperature power cut‑off, and programmable atmosphere control.

Water‑Cooled Cooling: Rapid, stable cooling of crucibles, minimizing moisture reabsorption and improving repeatability.

GMP‑Ready (Optional): Optional Computerized System Module with user management, electronic signatures, and audit trails for regulated environments.

Optional Sulfuric Acid Filling: Automated sulfuric acid addition for acid‑insoluble ash testing, enhancing operator safety.

Technical Specifications

Model	IRT-292-A	IRT-362-A
Numbers of Samples	29	36
Numbers of Balances	2
Crucible Capacity	10mL(Other custom - made available)
Constant Weight Error	0.3 mg
Weighing Range	220g (METTLER TOLEDO)
Balance Readability	0.1 mg
Residue Mass	0.1 mg~50g
Temp. Range	RT to 1000℃
Weighing Temperature	RT to 100℃
Temp. Control Accuracy	(RT to 150)±0.5 ℃；(150 to 1000)±2 ℃；
Heating Rate	(0-30)℃/min；
Cooling Method	Water - cooled
Ventilation Atmosphere	compressed air, Inert gas
Gas Source Pressure	>0.3 MPa
Interface Size	Φ8 mm
Dimensions	72(L)90(B)100(H) cm
Power Supply	AC220V /110V ;50/60Hz
Power	≤6000W

Standard Configuration

Main testing unit (host)

Quartz crucibles (quantity matching model capacity)

Professional testing software

Gas and water connection tubing

Optional Accessories

GMP Computerized System Module

Sulfuric Acid Filling Device

Corundum crucibles

Ceramic crucibles

Additional quartz crucibles

User‑Provided Items

Testing computer

Compressed air source (> 0.3 MPa)

Inert gas cylinder (if required)

Acids / alkalis

Pure water source

Application Industries & Scenarios

Pharmaceutical & Health Products

Ignition residue / sulfated ash (ChP, USP, EP)
Herbal extracts and API intermediates
Stability studies involving ash and residue profiling

Food, Feed & Agriculture

Total ash and acid‑insoluble ash in cereals, flour, starch, and animal feed
Tobacco ash analysis (YC/T 427)
Plant‑based materials and nutraceuticals

Environmental & Waste Management

Municipal solid waste, sludge, and incinerator residues
Soil and sediment ash content
Hazardous waste characterization

Chemicals, Petrochemicals & Materials

Polymers and resins (GB/T 9741, GB/T 14837)
Carbon black, coke, graphite (GB/T 3780.10, YB/T 5082)
Catalysts, inorganic salts, and specialty chemicals

Frequently Asked Questions (FAQ)

Q1: What is the difference between the IRT Series and a conventional muffle furnace?

A: A muffle furnace only provides high‑temperature ashing. After ignition, samples must be manually transferred to a desiccator and weighed-an error‑prone process. The IRT Series integrates drying, ashing, cooling, and weighing in one closed system, automating the entire constant‑weight procedure and eliminating manual handling.

Q2: Why is the “≤ 0.3 mg constant‑weight” feature important?

A: Pharmacopoeia and many national standards define constant weight as successive weighings differing by no more than 0.3 mg. Manual achievement of this criterion is tedious and inconsistent. The IRT automates it entirely, ensuring compliance and repeatability.

Q3: Can the IRT Series perform acid‑insoluble ash testing?

A: Yes. With the optional sulfuric acid filling device, the instrument can automatically add sulfuric acid prior to ashing, greatly improving operator safety and method consistency.

Q4: Which crucible material should I choose?

A: Quartz is standard for most applications due to its chemical inertness and thermal shock resistance. Corundum (alumina) or ceramic crucibles are recommended for strongly alkaline fluxes or aggressive acids.

Q5: Is the instrument suitable for volatile or explosive samples?

A: Yes. The system supports inert‑gas purging and features anti‑combustion / anti‑explosion safeguards, making it suitable for controlled ignition of potentially hazardous materials.

Functions
Loss on drying, total ash (total solids), ignition residue, acid - insoluble ash, volatile matter, etc.
It can replace muffle furnaces, drying ovens and balances to achieve constant weight.

Principle
Ignition, drying, and constant - temperature weighing.
Compliance Standards
- General Provisions of Constant Weight in Pharmacopoeia; "Determination of Ignition Residue" and "Determination of Ash" in Part IV of Pharmacopoeia
- "Determination of Loss on Drying" in Pharmacopoeia; "Gravimetric Method" in ASTM and ISO Standards
- GB 5009.4、GB18484、GB18485、GB/T 3780.10、GB/T 2295、GB/T 742 、GB/T 4498.1 、
- GB/T 4498.2、GB/T 508、GB/T7531、GB/T14837、GB/T9741、GB/T4324 、GB/T 23951、
- GB/T 31984、GB/T 6438 、YBT5082、HJ761、HJ1024、CJJ/T221、C JJ90、YC/T 427等。
Features
- Process: Complies with national and industry standard processes, enable fully automated drying and ignition for constant weight determination.
- Precision/High - efficiency: Achieves constant weight with an accuracy of 0.3mg, available with 9, 13, or 19 workstations.
- Integrated Design: The drying chamber, ignition chamber, cooling chamber and balance unit are integrated into one tester, footprint reduction.
- Fully Automated and Digitalized: Features stepped temperature increase and full-automatic control.
- Balance Protection: Utilizes patented isolation technology for heat, moisture, corrosion, and fire protection of the balance, ensuring its stability and service life.
- Safety: Equipped with anti - combustion and anti - explosion functions, and power - off in case of over - temperature.
- Software: Provides graphical, full - process, and all - element monitoring, along with multiple report formats.
- Optional: GMP "Computerized System" functional module.
- Optional: Sulfuric acid filling device.

Technical Specifications

Model	IRT-292-A	IRT-362-A
Numbers of Samples	29	36
Numbers of Balances	2
Crucible Capacity	10mL(Other custom - made available)
Constant Weight Error	0.3 mg
Weighing Range	210 g (METTLER TOLEDO)
Balance Division	0.1 mg
Residue Mass	0.1 mg~50g
Temperature Range	（Room temperature ~1000）℃
Weighing Temperature	（Room temperature ~100）℃
Temperature Control Accuracy	（Room temperature ~150）℃±0.5 ℃；（150~1000）℃±2 ℃；
Heating Rate	（0-30）℃/min；
Cooling Method	Water - cooled
Ventilation Atmosphere	compressed air, Inert gas
Gas Source Pressure	>0.3 MPa
Interface Size	Φ8 mm
Dimensions	72(L)90(B)100(H) cm	72(L)90(B)100(H) cm
Power Supply	AC220V /110V ;50/60Hz
Power	≤6000W

System Configuration
Main unit, quartz crucibles (quantity corresponding to the number of cavities), professional testing software, gas/water pipes.
Optional Accessories
Corundum crucibles, ceramic crucibles,quartz crucibles, sulfuric acid filling device.
Items to be Prepared by User
Testing computer, compressed air, inert gas cylinder, acid/alkali, pure water source.

Keywords:

Water Bath Drying Constant Weight Analyzer

Water Bath Constant‑Weight Analyzer for Total Migration & Loss on Drying