Extraction

Workstation model SMA-ARB

The behrotest^® workstation model SMA-ARB is a basic system for simultaneous aqua regia digestion of either 6 or 12 samples for heavy metals analysis.

System components:

• Precision 6 or 12 sample SMA heating block for round-bottom sample vessels of Ø 41.8 mm, temperature range 20 to 300 °C.
• External ET 2 controller, operating range 20 to 399°C. Time settings from 10 to 120 min. and continuous operation.
• 6 or 12 SR 2 250 ml round-bottom sample vessels with standard taper mouth and PVDF collar.
• 6 or 12 RFK 1 Allihn reflux condensers.
• 6 or 12 AS 1 absorption vessels.
• SG/B stainless steel vessel holding frame for 6 or 12 sample vessels.
• Support scaffold with cooling water distributor and storage holder for 6 or 12 condensers.

Workstation model SMA-ARM

The behrotest^® SMA-ARM workstations are provided with a programmable microprocessor-controlled time/temp. controller as well as a fume manifold for drawing off the acid vapors. This results in greater convenience and functionality in routine laboratory operations.

Economical and user-friendly units for extraction in accordance with Twisselmann:

• each sample position is individually adjustable
• cooling water distributor ensures an even cooling at all sample positions
• practical stand for holding the condensers securely between the extractions
• mounts for holding the spacers after the removal of the sample containers

Extraction and clean-up mixtures for sample preparation in the pesticide analysis of vegetable foodstuffs according to EN 15662 using GC/MS or LC/MS after acetonitrile extraction and purification using the dispersive SPE-QuEChERS method.

The samples are first extracted with Mix A. Purification is done with one of the following mixtures:

• Mix B (Clean-up mixture for fruits and vegetables with low fat content, e.g. apples, strawberries)
• Mix C (Clean-up mixture for fruits and vegetables with high fat content, containing oil/wax, e.g. avocados)
• Mix D (Clean-up mixture for moderately chlorophyll/carotenoid-containing fruits and vegetables, e.g. carrots, salad)
• Mix E (Clean-up mixture for fruits and vegetables with high chlorophyll/carotenoid content, e.g. sweet peppers, spinach)

If required, add ceramic homogenising beads for better mixing.

• Mix A contains a bag with the required amount of mixture and a 50 ml empty tube
• Mix B, C, D and E are pre-weighed into a 15 ml tube

Compact Extraction System in accordance with Twisselmann
Complete compact extraction system with stand, heating module, mount, hoses and glassware (round-bottom reaction flask, extractor, Dimroth condenser for extraction).

Complete compact extraction systems with stand, heating module, mount, hoses and glassware (round-bottom reaction flask, extractor, Dimroth condenser for extraction). Infinitely variable heating regulation.

• practical stand for holding the condensers securely between extractions
• extractor sizes from 30 ml to 5000 ml
• the use of extractors with a stopcock eliminates the need for any additional distillation after extraction
• Condensers with screwed-on tubing nipples

Accessories Extraction thimbles, Cellulose Accessories Cellulose-Extraction thimbles Grade 603 Alternative Serial Extraction Apparatus behrotest® for Soxhlet-/Fat-Extraction

• Filter mountings, 400 ml, with thread
• PP funnels with thread
• Slotted sieve plate with 2 gaskets
• Stainless steel rack
• Water jet pump

• Pollution monitoring, air sampling
• High temperature filtration (up to +500 °C)
• For solvents incompatible with cellulose thimbles (for example strong acids or bases)

Alternative Extraction thimbles MN 645, pure cellulose Alternative Extraction thimbles, Cellulose Alternative Cellulose-Extraction thimbles Grade 603 Alternative Extraction Thimbles, cellulose Alternative Extraction thimbles, Borosilicate glass

Recommended for Soxhlet extraction with solvents, which are incompatible with cellulose fibres and for filtration of air and gas streams.

• Made of 100 % pure borosilicate fibres, without binding elements
• High loading capacity and highly permeable to air
• Thickness is 1.5 mm (diameter < 33 mm)
• High retention of small particles, > 99 % according to BS 4400
• Good stability at high temperatures up to 500 °C
• Recommended for hot, moist, and acidic gases
• Gravimetric determination of particles in hot gases

Further sizes on request.

Supplied in packs of 25. Dimensions given are nominal internal diameter x external length in mm.

Alternative Cellulose-Extraction thimbles Grade 603 Alternative Extraction Thimbles, cellulose