ARACUS “classic” Amino Acid Analyzer

The ARACUS “classic” Amino Acid Analyzer is a fully automated, high-precision system designed for quantitative and qualitative analysis of amino acids in complex biological and food matrices. Based on the high-performance ion-exchange chromatography (IEC) principle with post-column derivatization using ninhydrin, the ARACUS “classic” delivers high sensitivity, reproducibility, and regulatory compliance for a wide range of applications. Developed by membraPure GmbH, the ARACUS system is renowned for its reliability in amino acid profiling of protein hydrolysates, cell cultures, body fluids, feed, and food samples. Its modular design includes pre-configured methods (e.g., physiological, food, and feed), customizable injection parameters, and automated sample handling for up to 120 samples via autosampler. The ARACUS “classic” model offers a balance of advanced features and ease of use, supported by intuitive software, robust hardware, and long-term operational stability, making it the ideal solution for laboratories requiring accurate and standardized amino acid analysis.

Technical Specifications of ARACUS “classic” Amino Acid Analyzer

Method

• post column derivatization with Ninhydrin

Autosampler

• 2 racks, each of them with space for 48 vials, sample cooling dosage in 3 different injection modes: full loop (100 μL), partial loop (5 – 50 μL), microliter pickup (1 – 35 μL)

Column

• stainless steel, cation exchange resin reproducibility of retention time < 0.3 % RSD, reproducibility of peak area ~ 1.0 % RSD

Column Oven

• 20 – 100 °C, accuracy 0.1 %

Reactor Temperature

• 20 – 140 °C

Spectroscopic detection

• measuring range: high, low LED photometers (440 nm + 570 nm), 8 years warranty, flow cell: 10 μL volume, 3 years warranty

Detection limit

• < 40 pmol / 20 µL with Ninhydrin

Quantification limit

• > 100 pmol / 20 µL with Ninhydrin

Pump system

• single pump, reproducibility of low rate: 0.1 % RSD at 100 μL/min, max. pressure: 400 bar | flow rate: 0.01 – 10.00 mL/min

Maximum operating pressure

• 120 bar

Ready to use kits

• kits including eluents, reagent and additional dilution buffer, ammonia adsorber and separation columns for 500 – 1000 runs

Columns & Eluents

• Compatible with all columns, operating with all eluents based on different ionic strength (Li, Na, K)

Control software & Data acquisition

• Clarity (21 CFR part 11 compliant) or AminoPeak

Power

• 110 – 230 V

Dimensions

• 1080 mm x 370 mm x 375 mm

Weight

• 60 kg