Graphite Digester

Introduction

A graphite digester is used for sample digestion in chemical analysis before elemental testing. It provides uniform heating and controlled temperature conditions for preparing samples for nitrogen, metal, or nutrient analysis. It is widely used in environmental, agricultural, and food laboratories for sample preparation.

Standards

ISO 1871:2009-Food and feed products-General guidelines for the determination of nitrogen by the Kjeldahl method

Complies with the above standards, but is not limited to them.

Features

1. Graphite digester for wet digestion of samples in analytical laboratories.

2. High-performance graphite heating block provides uniform temperature distribution.

3. Digital temperature control with precise set points and temperature display.

4. Corrosion-resistant construction designed for acid digestion applications.

5. Suitable for environmental, food, agricultural and industrial sample preparation.

FAQ

Q1: What is the graphite digester mainly used for?

A: It is used to digest solid and liquid samples with acids before elemental analysis by ICP, AAS, or other spectroscopic methods. Typical samples include soils, water, foods, feeds, plants and industrial materials requiring complete dissolution of metals and other analytes.

Q2: What standards does the digester comply with?

A: The unit is designed with reference to IEC 61010 electrical safety requirements and relevant GB/T standards for laboratory heating and digestion equipment. Digestion procedures should follow applicable standard methods such as those for soil, water and food analysis. Compliance documentation can be provided on request.

Q3: What is the warranty period for the digester and key components?

A: The complete unit carries a 12-month warranty covering the heating block, controller and housing. Digestion tubes, temperature sensors and accessories are excluded. Damage from improper acid use or unauthorised repair is not covered.

Q4: Is the digester difficult to operate?

A: Operation requires basic training in acid digestion procedures and safety handling. The manual explains temperature setting, sample loading and safety precautions, and remote guidance is available. Proper fume extraction should be used during digestion.

Q5: What is the typical lead time for order delivery?

A: Standard models require 7-30 working days. In-stock units can ship within 3-7 working days. Custom configurations or large built-to-order systems may require additional time, and we confirm the exact schedule before order confirmation.

Q6: Does the digester require calibration or verification?

A:Temperature readings should be verified periodically against a calibrated reference thermometer, typically every 6 to 12 months. The unit is factory tested before delivery. Optional calibration service can be arranged.

Q7: Are consumables or spare parts universal?

A: Digestion tubes and standard spare parts are available through our channel and are compatible with common digestion workflows. No proprietary consumables are required. Provide the model and serial number when ordering.

Q8: Can the digester be customised?

A: Yes, options include different tube capacities, additional heating blocks, 220V or 110V supply and data logging. We confirm each option before order confirmation.

Q9: Is installation and commissioning included?

A: The unit is commissioned by following the manual, including electrical checks and a temperature test. Remote guidance is available during first use. On-site installation can be arranged separately.

Q10: What materials should not be digested in this unit?

A: Perchloric acid and other explosive oxidisers should be used only with appropriate safety precautions and equipment designed for them. Highly volatile or reactive materials require special handling. Follow laboratory safety regulations.