Product details:
In 1923 Fritz Pregl received the Nobel prize in chemistry for developing the methods for the elemental micro analysis of organic substances.
We are proud that he worked with apparatus manufactured by Heraeus in Hanau which later became the origin of the product line of Elementar Analysensysteme.
Elementar made significant new developments that also added elemental analysis of macro samples – for good reasons:
• apart from the analysis of synthesis products in the chemical or pharmaceutical lab, the analysism of CHNS today is just as important for agricultural products, environmental samples like sludge or solid waste, soil samples, industrial products or fossile fuels (coal, oil)
• representative quantitative analysis of such inhomogeneous samples requires the direct determination of larger sample amounts or laborious homogenization
• low concentrations, e.g. of nitrogen or sulfur in natural substances like soil or plant material require also large sample weights for reliable determination
• large sample weights connected with easy sample handling are precondition for the routine analysis in close connection to process quality control
Measuring method:
The basic principle of operation is high temperature digestion of the sample at 800°C to 1200°C with subsequent scrubbing of non-analytes from the combustion gases. The analyte gases are transported in a helium carrier stream. After reduction of formed nitrogen oxides the gas mixture is separated in its components which are sequentially released to a
detector (TCD). Furthermore, percent contents of the elements are calculated from the detector signal in connection with the sample weight and the stored calibration curve.
Principle: combustion method at 850°-1200°C (1800°C by combustion in tin boats) ”Purge-and-trap” gas separation and TCD detection
Operation modes / versions: N, CN, CNS, CHN, CHNS (upgradability N to CN, CN to CNS, CHN to CHNS). Options for the determination of O as well as Cl
Measuring ranges:
C: 0.002% up to 100% (or max. 100 mg abs.)
N: 0.004% up to 100% (or max. 100 mg abs.)
H: 0.015% up to 100% (or max. 15 mg abs.)
S: 0.004% up to 100% (or max. 15 mg abs.)
O: 0.05% up to 5 mg abs.
Cl: 0.1 – 50 μg abs.
Sample weight: up to approx. max. 1.5 g respectively up to 1 g soil or 500 mg organic material
Precision: ≤ 0.5% RSD (for 100 mg test substance, e.g. glutamic acid)
Analysis time: self-optimizing, depending on element content and weight
e. g. 4 min. for N in 100 mg glutamic acid,
6 min. for CN for 100 mg soil sample
Autosampler: 39 positions (standard), for sample volume up to 1 cm3 79 positions (optional) for approx. = 50 mg sample
Gases:
He: 99.995 % purity
O2: 99.995 % purity
Instrument control external PC under Windows®, automatic leak test, error diagnosis, maintenance cycles,
and evaluation data: statistics, sleep/wake-up function, LIMS compatible;
in accordance with the requirements 21 CFR Part 11 (option)
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