A New Approach for Easy Setup of MRM based Multi-residue Analysis on GC-MS/MS The new Bruker MS Workstation software employs unique new compound based scanning (CBS) workflow for setting up the multi-residue MRM method on Bruker SCION TQ triple quadrupole mass spectrometer.
LEA-S500 is a universal mini-laboratory for quality control of goods Efficient control of a manufacturing process becomes impossible without a fast and exact analysis of chemical composition of raw materials and finished goods. According to the opinion of the author the ideal equipment for the task solution is the Laser Elemental Analyzer LEA-S500.
Myths of the Internal Standard Problems of the internal standard method, realized by means of a graphic “concentrations relationship/responses relationship” are discussed. An example of a concentration determination error in case of linear relationships and precise measurements is given. It is shown that results of concentration prediction attained by a “conventional” solution and by the proposed alternative method are equivalent at directly-proportional calibration.
Multiresidue screening of doping substances by liquid chromatography and mass spectrometry methods We report the achievements in the field of novel analytical approaches making it possible to analyze a lot of substances. A new methodology that consists in the application of high performance liquid chromatography coupled to different mass spectrometric methods is the basis for the proposed approaches.
Simultaneous determination some pharmaceuticals using liquid chromatography-high resolution mass spectrometer LTQ Orbitrap The article presents the method of the simultaneous determination of 12 pharmaceuticals, belonging to different classes, by the method of liquid chromatography high-resolution mass-spectrometry. The results of quantitative determination of studied compound in natural water samples of different water bodies of North-West Region in the period 2009-2011 are proposed.
Determination of antioxidants in cacao and chocolate The concept of modern medicine – the prophylactic of diseases. The healthy way of life helps the person to keep working capacity, vivacity, social activity for long years. The important role in tonus maintenance is played by a food. The meal becomes the factor of maintenance of health, thanks to the contents of vitamins, minerals and antioxidants. Last years to natural antioxidants the intent attention is turn. A great number of investigations testify to their beneficial effect on a human body: immunity becomes stronger, the probability of cardiovascular, oncologic and endocrine diseases decreases. Cocoa concerns number of products especially rich with antioxidants. Article also is devoted studying of its antioxidant properties.
The Keys to Calibration of Test Sieves Increasing pressures for ISO 9000 certification have created a heightened interest in improving the quality control of test-sieving programs.
The article presents the simple method of calibration working test sieves that is both easy and inexpensive.
Guidelines for the Design of HPLC Analytical Methods In Accordance with International Recommendations An easy and convinient approach to the design of HPLC analytical methods in Russian has been proposed that complies with general international recommendations. The article also contains the discussion of the most arguable topics that deal with the design of chromatographic analytical methods.