Xianghu XH-8012 Digital Electric Hotplate for Acid Digestion and Solvent Evaporation
| Brand | Xianghu |
|---|---|
| Origin | Beijing, China |
| Manufacturer | Yes |
| Country of Origin | China |
| Model | XH-8012 |
| Heating Power | 1500 W |
| Max. Heating Temperature | 260 °C |
| Temperature Uniformity | ±1 °C |
| Plate Dimensions | 520 × 300 mm |
| Heating Zone Diameter | 50 mm |
| Display | LED Numeric Display |
Overview
The Xianghu XH-8012 Digital Electric Hotplate is a purpose-built thermal platform engineered for controlled acid digestion, post-digestion acid removal (commonly termed “acid evaporation” or “acid chasing”), and sample concentration in analytical chemistry laboratories. Unlike general-purpose hotplates, the XH-8012 integrates a high-power resistive heating element with precise digital temperature regulation to maintain stable thermal conditions across its large ceramic-coated aluminum plate surface. Its design adheres to fundamental requirements for trace metal analysis workflows—minimizing contamination risk through inert surface materials and enabling reproducible thermal profiles essential for method validation under ISO/IEC 17025 or EPA Method 3050B and 3052 frameworks. The unit operates on standard 220 V AC power and is intended for benchtop use in QA/QC labs, environmental testing facilities, and university research settings where open-vessel digestion and subsequent acid volatilization are routine preparatory steps prior to ICP-OES, ICP-MS, or AAS analysis.
Key Features
- 1500 W high-efficiency heating system delivering rapid thermal response and sustained output up to 260 °C—sufficient for HNO₃, HCl, HF, and H₂O₂ evaporation without thermal degradation of PTFE or quartz labware.
- Digital LED display with real-time temperature readout and adjustable setpoint control (resolution: 1 °C), supporting both manual operation and time-based ramp-hold protocols when paired with external timers.
- Large 520 × 300 mm heated surface with optimized heat distribution; localized heating zone (Ø50 mm) ensures focused energy delivery beneath crucibles or digestion vessels while minimizing ambient heat loss.
- Ceramic-enamel coated aluminum plate offering chemical resistance to strong mineral acids, mechanical durability against thermal shock, and low particulate shedding—critical for low-background elemental analysis.
- ±1 °C temperature uniformity across the active zone, verified per ASTM E220 calibration guidelines using NIST-traceable thermocouples, ensuring inter-laboratory comparability of digestion outcomes.
- Front-panel controls with over-temperature protection circuitry and automatic cut-off at 280 °C, complying with IEC 61000-4 electromagnetic compatibility standards and UL 61010-1 safety requirements for laboratory electrical equipment.
Sample Compatibility & Compliance
The XH-8012 accommodates standard digestion vessels including 50–100 mL PTFE Teflon™, quartz, and borosilicate glass beakers and crucibles. Its flat, non-porous surface prevents residue accumulation and facilitates cleaning between runs—supporting GLP-compliant documentation of cleaning validation. The device is compatible with EPA SW-846 Methods 3015A (microwave-assisted acid digestion) and 3050B (open-vessel acid digestion), where post-digestion acid removal is required to achieve final solution volumes suitable for instrumental analysis. While not a microwave instrument itself, it serves as a critical complementary tool in hybrid workflows involving microwave digesters (e.g., CEM MARS or Anton Paar Multiwave systems). No CE marking is affixed; users deploying this unit in EU-regulated environments must verify conformity via local notified body assessment per Machinery Directive 2006/42/EC.
Software & Data Management
The XH-8012 operates as a standalone analog-digital hybrid instrument with no embedded firmware, network interface, or proprietary software. Temperature setpoints and operational status are managed exclusively via front-panel buttons and LED display—ensuring deterministic behavior, immunity to cybersecurity vulnerabilities, and full auditability in regulated environments. For laboratories requiring electronic recordkeeping under FDA 21 CFR Part 11 or ISO 17025 Clause 7.5.2, integration with external data loggers (e.g., Omega OM-DAQPRO or Testo 176 T4) is supported via optional K-type thermocouple input. All calibration records, maintenance logs, and usage histories must be maintained manually or within a validated LIMS environment.
Applications
- Acid evaporation following microwave or hot-block digestion of soil, sediment, biological tissue, and polymer samples.
- Concentration of digests prior to dilution for multi-element determination by ICP techniques.
- Drying and charring of filter papers in gravimetric analysis of suspended solids or ash content.
- Controlled solvent removal in organic extract cleanup procedures (e.g., EPA Method 8270).
- Pre-heating of reagents and standards in trace-metal cleanrooms where microwave exposure is prohibited.
FAQ
Is the XH-8012 compatible with microwave digestion systems?
Yes—it is routinely used downstream of microwave digesters to remove residual nitric or hydrochloric acid from cooled digestate solutions.
Can it be used for HF-based digestions?
Yes, provided PTFE or quartz vessels are used; the ceramic-coated surface resists HF corrosion, though direct contact with liquid HF is not recommended.
Does it support programmable temperature ramps?
No—the unit lacks built-in programming capability; external timer relays or PLC controllers are required for multi-step thermal protocols.
What calibration standards apply?
Users should perform periodic verification using NIST-traceable thermocouples per ASTM E220 or ISO/IEC 17025 Section 6.4.3, documenting deviations greater than ±1 °C.
Is service documentation available in English?
Technical specifications and safety instructions are provided in bilingual (Chinese/English) format; full service manuals and spare parts lists require direct request from Xianghu’s international support desk.
