best@buchi
Sample Preparation for Trace Analysis of PAHs in Soil and Groundwater Using Syncore® Analyst
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The parallel evaporator, Syncore® Analyst, is shown to excel in sample preparation for the determination of polycyclic aromatic hydrocarbons. |
377 K |
Cocaine and Heroin Content Determination with NIR
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Confiscated street drug samples are mixtures with different drugs and cutting agents. Despite these different drug mixtures, exact NIR measurements are performed using the Buchi NIRFlex N-400 spectrometer. With Buchi NIRCal Chemometric Software only one calibration each for all heroin and all cocaine samples for a broad concentration range could be developed. |
302 K |
Extraction of Organohalides from Fish Tissue
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Use of the Extraction System B-811 from Buchi to modify the Classic Soxlet Extraction (EPA Method 1656, Revision A) |
548 K |
Extraction of Semi-Volatile Organic Compounds (BNAs) from Fish Tissue
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Use of the Extraction System B-811 from Buchi to modify the Classic Soxlet Extraction (EPA CLP SOW) |
416 K |
Application of NIR Spectroscopy in the determination of chemical composition of thawed precooked
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Near Infrared (NIR) spectroscopy finds application in quantitative and qualitative analysis of food products, allowing a rapid control of raw materials, a critical point in assuring product quality. An FT- NIR Spectrometer (NIRLab N-200, BÜCHI Labortechnik AG, Flawil, Switzerland) has been used to evaluate fat, protein, dry matter and ash content in thawed precooked tuna fish fillets, which are the raw material for the production of canned tuna fish. NIR spectra were recorded in reflectance mode from 4000 to 10000 cm-1 interval and the chemometric interpretation were performed using NIRCal 4.21. |
211 K |
Polycationic Ultraresins, a new generation of high loading, inexpensive polymer reagents - Polymer-supported reductions with Buchi's Syncore®
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A novel class of high loading polymer reagents based on the cross linking of polyethylene imines was generated. The new polymer borohydride exchange resin was applied successfully in the reduction of aldehydes, ketones, nitroolefines and in the |
144 K |
Parallel Synthesis - Reductive Amination of Aldehyde Group
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Parallel optimisation of reductive amination of substituted furane-2-aldehydes to 2-dialkylaminofuranes (4 x 24 samples) by using the BÜCHI Syncore Reactor with its Filtration Unit. The reaction itself, drying and evaporation of organic extracts are accelerated by using Syncore. |
177 K |
Automated optimisation of NIR calibrations
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Applying chemometric techniques for method development, which generally at least needs a certain degree of chemometric experience, is a big hurdle for the wider acceptance of Near-infrared spectroscopy. The NIRCal® Chemometric Software contains a comprehensive Calibration Wizard, which assists the user in developing robust calibrations without extensive chemometric knowledge. Calibrations become more objective and less dependent on the user?s knowledge. |
430 K |
Parallel solid-phase synthesis of C-5 and C-6 substitutedpyrimidinones
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In the following work a small library of C-6 substituted pyridinones was synthesized. The reactions are based on Wang solid phase resins and were performed on a Syncore® Reactor. The cleavage was done with Oxone® with the Büchi Filtration Unit. |
496 K |
The determination of key quality parameters in Rice using FT-NIR
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In this application near-infrared (NIR) spectra recorded off line of 180 different rice samples combined with the multivariate regression method partial least squares (PLS) was used, for the quantification of protein, moisture and fat. |
799 K |