English Product Name
| Brand | Jihepu |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | JRX-S |
| Price Range | USD 1,400–7,200 (FOB) |
| Instrument Type | Graphite Block Digestion System |
| Automation Level | Fully Automatic |
| Digestion Positions | 10 |
| Heating Principle | Dual-mode — Single-point ramp or 1–40-step programmable temperature ramping |
| Reagent Channels | 10 independent digestion wells |
Overview
The Jihepu JRX-S Graphite Block Programmable Digestion System is an engineered solution for controlled, reproducible wet-chemical sample digestion in accordance with classical EPA Method 3050B, ISO 11466, ASTM D3682, and GB/T 5009.11–2014 protocols. It operates on the principle of conductive heating via a high-density graphite block, enabling precise thermal energy transfer to digestion vessels—typically borosilicate or quartz tubes—during acid-mediated mineralization of organic and inorganic matrices. Designed as a primary sample preparation tool for elemental analysis workflows (e.g., ICP-OES, ICP-MS, AAS), the JRX-S serves as a critical upstream component for Kjeldahl nitrogen analyzers and trace metal quantification pipelines. Its dual-mode heating architecture supports both static single-point ramping and multi-segment dynamic temperature profiling—essential for optimizing decomposition kinetics of heterogeneous samples such as plant tissues, soils, sediments, petrochemical residues, and biological feedstocks.
Key Features
- High-density graphite heating block rated for continuous operation up to 600 °C, delivering exceptional inter-well temperature uniformity (<±1.5 °C at 200 °C) and minimal thermal lag during ramp transitions.
- Dual-layer insulated housing with forced-air ventilation system ensures stable long-duration operation (>8 h) under ambient temperatures up to 35 °C and prevents external surface overheating.
- Integrated surface overtemperature sensor triggers audible alarm and automatic power cutoff when external casing exceeds 70 °C—complying with IEC 61010-1 safety requirements for laboratory electrical equipment.
- 5.5-inch full-color capacitive touchscreen interface with bilingual (English/Chinese) firmware, supporting intuitive navigation, real-time temperature graphing, and audit-ready event logging.
- Advanced PID auto-tuning algorithm with adaptive gain scheduling maintains ±1 °C control accuracy across the full 30–600 °C range, even during rapid ramping (6–10 °C/min).
- Segmented power delivery architecture isolates heating zones to prevent unattended reactivation after grid interruption—a feature aligned with GLP-compliant lab practices requiring procedural continuity and risk mitigation.
- Stainless steel brushed work surface (AISI 304) provides resistance to incidental acid splashes and mechanical abrasion during routine handling of digestion tubes and catalysts.
Sample Compatibility & Compliance
The JRX-S accommodates standard 42 mm OD digestion tubes (e.g., SCP Science, Qorpak, or custom quartz variants) within its 10 precisely machined wells (Φ43.5 mm). It supports open-vessel digestion using HNO₃, HCl, HF, H₂O₂, and HClO₄—compatible with EPA SW-846 Methods 3050B, 3051A, and 3052. The system meets CE marking requirements per Directive 2014/30/EU (EMC) and 2014/35/EU (LVD), and its firmware architecture supports optional 21 CFR Part 11-compliant user access control and electronic signature modules when integrated with validated LIMS environments. All hardware components conform to RoHS 2011/65/EU restrictions on hazardous substances.
Software & Data Management
The embedded controller stores up to nine preconfigured digestion methods, each comprising up to 40 temperature/time segments with independent ramp rates, hold durations, and cooling profiles. Method editing employs a tabular input format—minimizing syntax errors and ensuring traceability. Temperature data is logged at 1-second intervals and exportable via USB to CSV for post-processing in Excel or statistical software. Optional firmware upgrade enables timestamped event logs (start/stop, alarm triggers, manual overrides) required for ISO/IEC 17025-accredited laboratories conducting method validation studies.
Applications
- Agricultural & environmental testing: Digestion of crop tissues, compost, sludge, and sediment for Cd, Pb, As, Cr, and Hg determination by ICP-MS.
- Geochemical analysis: Decomposition of silicate rocks and ores using HF-HNO₃ mixtures prior to rare earth element (REE) quantification.
- Food safety labs: Preparation of infant formula, dairy powders, and fortified cereals for total arsenic speciation workflows.
- Petrochemical QA/QC: Acid digestion of lubricating oils and refinery catalysts for V, Ni, Fe, and Na content assessment.
- Academic research: Controlled thermal degradation studies of polymer composites and nanomaterial-containing matrices.
FAQ
What is the maximum recommended operating temperature for continuous use?
The graphite block is rated for sustained operation at ≤550 °C; 600 °C is specified as absolute design limit and intended only for short-duration calibration or method development.
Does the system support remote monitoring or network integration?
Standard configuration includes USB data export only; Ethernet or Wi-Fi connectivity requires optional communication module (JRX-NET-1) and third-party SCADA integration.
Are digestion tubes included with the instrument?
No—tubes are sold separately; compatible options include borosilicate glass (42 mm OD, 150 mL capacity) and quartz variants for HF-based protocols.
Can the JRX-S be used for closed-vessel microwave-assisted digestion?
No—it is designed exclusively for open-vessel, atmospheric-pressure digestion; closed-system applications require dedicated microwave digestion platforms.
Is method validation documentation available for regulatory submissions?
Yes—Jihepu provides IQ/OQ protocol templates and temperature uniformity test reports upon request, aligned with USP and ISO/IEC 17025 Annex A.3 requirements.
