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OHAA-810 Atomic Absorption Spectrophotometer
The OHAA-810 is a single-flame Atomic Absorption Spectrophotometer that deliberately omits graphite furnace capability, offering a focused tool for routine environmental and industrial quality control labs where trace metal throughput, not ultratrace sensitivity, is the priority.
Many labs measure metals like copper, lead, and cadmium daily — in water, soils, or alloys. For these tasks, the full graphite-furnace workflow is often overkill. The OHAA-810 meets this demand with a single-flame air-acetylene system and high-efficiency glass atomizer, delivering a copper detection limit of 0.003 µg/mL and a repeatability RSD below 0.6%.
The optical train is straightforward but competent: a Czerny-Turner monochromator with a 270mm focal length and 1800-line/mm grating yields a spectral bandwidth deviation of ±0.02nm. Wavelength accuracy holds at ±0.1nm, and baseline stability stays under 0.003A over 15 minutes. For background correction, a deuterium lamp handles matrix interference, achieving correction capability above 50 times.
Operationally, the instrument is built for consistency. The eight-position HCL lamp turret preheats all lamps simultaneously, and the 10cm titanium combustion head is manually adjustable in height, front-rear position, and angle. A three-way gas design with rotary flowmeters gives the operator precise control over the air-acetylene flame, while automatic ignition and multi-parameter safety monitoring — gas pressure, flame status, water seal, and waste liquid level — reduce supervision overhead.
The OHAA-810 occupies a specific niche: it is a flame-only AAS that does not try to be everything. There is no graphite furnace power supply, no heating ramp controls, and no automatic sampler for that mode. The optional hydride generator and automatic flame sampler, however, extend its utility for mercury and arsenic analysis or higher-throughput workflows.
For procurement managers in Chinese environmental monitoring stations, food safety labs, or small metal processing facilities, this represents a deliberate cost-performance trade-off. By excluding the graphite furnace module — and its associated power supply, cooling, and automation costs — the OHAA-810 keeps acquisition and maintenance lower than a combined system.
It also reveals something about the domestic instrument market: Chinese manufacturers are segmenting AAS offerings by application rather than by brand tier. The OHAA-810 is a workhorse, not a flagship — and that is precisely why it is useful.
The software back-end — handling automatic curve plotting, RSD and detection-limit calculation, and custom report generation — completes the package for labs that need data integrity without over-engineering.
Why it matters:
For labs whose metal analysis workload is 80% flame-appropriate elements, this instrument removes the cost premium of an unused graphite furnace. It signals a maturing Chinese supply chain that can deliver focused, reliable analytical hardware at competitive price points.
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