Automatic laboratory mercury analyzer

AULA-254 Gold

The AULA-254 Gold is a fully automated system for analyzing traces of mercury in aqueous and digested samples

In contrast to a typical multi-element AAS the AULA is specially designed for mercury determination. The use of a highly stable low-pressure electrodeless mercury discharge lamp (EDL) in connection with the latest UV detector techniques result in excellent baseline stability and low detection limits.

The AULA-254 Gold system meets current regulations, with capacity in reserve to meet more stringent standards.

  • Fully automated flow analysis system
  • Compact modular construction
  • Proven and reliable detection method: cold vapor atomic absorption (CVAAS)
  • Integrated GoldTrap for a maximum of sensitivity of <1 ng/l (can be turned off or on)
  • Wide linear measuring range
  • No zero drift (auto zero before each measurement)
  • High productivity
  • Economical: low reagent consuption
  • Autosampler with up to 53 vials (turntable)
  • Automatic purging after exceedance of mercury concentration
  • Minimized memory effect
  • Easy to operate with AULAWIN software
  • Automated Sample Digester Module (ASD) for liquid samples as an optional accessory
  • Typical applications include analysis of aqueous samples that have to be digested oxidatively before reduction: surface water, groundwater, effluent, process water.
  • Environmental monitoring: water, soils, sludge …
  • Analysis of foodstuffs: fish, innards, plants …
  • Medicine: urine, blood, saliva, hair …
  • Chemical industry: process monitoring, quality control …
  • Geochemistry, mining
  • Petrochemistry
  • Metallurgy and material testing
  • Applicable to EPA Methods: 245.1, 245.7, 1631, 7470 and 7471A
Technical Specifications
Measuring principle Amalgamation (MI GoldTrap), cold vapor atomic absorption (CVAAS) at 253.7 nm
UV-Source Electrodeless low pressure mercury lamp (EDL)
Stabilization method Reference beam method
Optical cell Fused silica (Suprasil), l: approx. 230mm, heated approx. 45°
Measuring range 10 ng/l to 50 µg/l (GoldTrap deactivated); 1 ng/l to 5 µg/l (GoldTrap activated)
Detection limit: < 50 pg Hg (GoldTrap deactivated); < 5 pg Hg (GoldTrap activated)
Carrier gas argon (optional nitrogen), 4-6 l/h; stabilized with electronic mass flow controller
Sample vials 10 ml, glass with aluminium foil disk covers
Sample consumption approx. 1 ml
Heating coil temperature approx. 98 °C (AULA-ASD only)
Measuring duration typ. 60 – 180 seconds
Technical data
Signal outputs 2 x USB
Power supply 230 VAC / 50 Hz (110 VAC / 60 Hz option)
Power consumption approx 100 VA (AULA-254 ASD: 120 VA)
Dimensions (W x H x D) 37 x 38 x 44 cm
Bench space requirements approx. 50 x 70 cm (PC not included)
Weight approx. 14 kg (PC not included)
  • Our products are manufactured according to the ISO 9001 quality regulations.
  • CE approved

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