solid AA Direct Solids Analysis
No wet chemical sample preparation
No dilution errors or analyte losses
solid AA – direct solids analysis technique for graphite furnace AAS
The solid AA technology enables direct solid analysis without elaborate sample preparation. Solid, pasty or viscous substances are automatically or manually transferred directly into the graphite tube. Heterogeneous samples are only ground and homogenized before analysis.
The decomposition of the sample matrix by means of an acid digestion is replaced by the temperature program of the graphite furnace. Combined with a powerful background correction, the interference-free and precise determination of almost all elements in numerous materials is possible. The graphite furnace technique is subject to few interferences caused by the sample matrix. Therefore, even liquid calibration standards may be used in most cases. A calibration with solid matrix reference materials, which are expensive and often not available in the correct composition, is usually not necessary. The Analytik Jena graphite furnace systems can be converted from liquid to solid state analysis in just a few minutes - ensuring both techniques may be used without restriction. All functions are integrated in the operating software. Additional modules are not required. Easy, software-guided routines allow a simpler adjustment of the autosamplers and guarantee a reliable sample supply.
Two different samplers are available for the solid AA, which can be used with the graphite furnace systems of the contrAA and ZEEnit instrument series:
- SSA 6 – manual solid sampler
- SSA 600 – fully automated solid sampler with liquid dosing unit
Advantages of solid AA:
- The labor and time associated with sample preparation are minimized
- Analysis of the original sample – no dilution errors or analytic loss
- Broad measurement range – boost in measurement sensitivity by at least ten times compared to solution analysis
- Analysis of extremely small sample quantities – approximately 50 µg are sufficient for element determination
- Elimination of harmful reagents
- Fast results thanks to direct analysis
SSA 6 — manual solid sampler
The manual solid sampler is suitable for the occasional solid analysis. The sample is weighed on a separate microbalance and is brought into the graphite furnace by means of the sampler. After the analysis is complete, the sample carrier is immediately ready for use for the next sample.
SSA 600 — fully automated solid sampler
An autosampler for the fully automated analysis of up to 84 samples. Simply dose the samples onto the sample carriers.
The autosampler automatically weighs in the sample using the integrated microbalance with a precision of 1 μg, it carries out the calibration with liquid standards and the addition of a modifier and transports the sample into the graphite furnace and back to the sample tray. The process does not require supervision. Dosing and weighing of the sample can be controlled easily via the operating keys on the autosampler. The sample mass is imported directly into the software. Additional software routines, such as the automatic clean-out and taring of all sample carriers, simplify operation when used as a part of a daily routine.
The direct solid analysis using solid AA is the easiest way to reliable analytic results in research and routine. The wide range of applications comprises for example the following industries:
Plants, tissue, bones, fur
Cd, Pb, As, Se, Nl, Cr, Co, Mn
|Soil, sediment, ash, waste, dust||Cd, Pb, Cu, Fe, Mn, Ni, Cr, Sn|
Margarine, fats, oils
|Grain, vegetables, meat||Cd, Pb, Cu, Ni, Zn, Se, Na, Fe|
|Jam, honey||Cd, Pb, Fe, Ni|
|Clinical Chemistry/ Medicine/Hygiene/ Healthcare|
Bacterial culture, DNA
|Cells, metabolism||Cd, Pb, As, Se|
|Tissue, liver, kidney||C, Pb|
|Hair, finger nails||As, Se, Pb, Cd, Si|
|blood (on filter paper)||Pb|
Cd, Pb, Cr, Cu, Fe, Mn
|Reference materials (homogeneity)||Cd, Pb, Fe, Zn|
|Refractory glasses, ceramics||Pb, Mg, Na|
|Alloys||Se, Sb, Bi|
|Ion exchangers||Pd, Au, Ag, Ni, Co, Zn|
Acting, flavoring and bulking agents
Pb, Cd, As, Cr, Ni, Mn, Fe
solid AA – fully integrated into the software
All functions of the solid AA technology are pre-integrated into the basic software. The purchase and installation of additional software modules is not required. The fully automated analysis run is controlled and managed through an intuitive software concept that is adapted to the specifics of solid sampling. First, the tare weights are recorded in an automatic routine. Then the sampler brings the sample carrier to the dosing position. Now the user can dose the calibration standards, the samples and, if applicable, the modifier. Dosing and weighing can be confirmed by mouse click or via the function keys on the autosampler. All sample weights are automatically transferred to the sample table and used for calculating the concentration. Simple, software-guided routines are available for adjusting the autosampler. The switch between liquid and solid analysis occurs within a few minutes.