Phosphorus mass spectrometric

GC nitrogen-phosphorus detector (NPD), flame photometric detector (FPD), electron capture detector (BCD), flame ionization detector (FID), mass-spectrometric detector (MS)... 

On the other hand, if only specific GC detectors, e.g. the electron capture, nitrogen-phosphorus or flame photometric detectors, are tested, the argument of lack of GC method sensitivity is not acceptable. In most cases mass spectrometric detectors provide the sensitivity and selectivity needed. Unfortunately, tandem mass spectrometry (MS/MS) or MS" detectors for GC are still not widely used in official laboratories, and therefore these techniques are not always accepted for enforcement methods. 

For multi-analyte and/or multi-matrix methods, it is not possible to validate a method for all combinations of analyte, concentration and type of sample matrix that may be encountered in subsequent use of the method. On the other hand, the standards EN1528 andEN 12393 consist of a range of old multi-residue methods. The working principles of these methods are accepted not only in Europe, but all over the world. Most often these methods are based on extractions with acetone, acetonitrile, ethyl acetate or n-hexane. Subsequent cleanup steps are based on solvent partition steps and size exclusion or adsorption chromatography on Florisil, silica gel or alumina. Each solvent and each cleanup step has been successfully applied to hundreds of pesticides and tested in countless method validation studies. The selectivity and sensitivity of GC combined with electron capture, nitrogen-phosphorus, flame photometric or mass spectrometric detectors for a large number of pesticides are acceptable. 

Barcelo D, Porte C, Cid J, Albaiges J (1990) Determination of organophosphorus compounds in Mediterranean coastal waters and biota samples using gas-chromatography with nitrogen-phosphorus and chemical ionization mass-spectrometric detection. Int J Environ Anal Chem 38(2) 199-209... 

It is well known that a great variety of biomolecules exist where metals and metalloids are bound to proteins and peptides, coordinated by nucleic acids or complexed by polysaccharides and small organic ligands such as organic acids.55 Most proteins contain amino acids with covalently bonded heteroelements such as sulphur, selenium, phosphorus or iodine.51 Several reviews have been published on the development of mass spectrometric techniques for bioanalysis in metal-lomics , which integrate work on metalloproteins, metalloenzymes and other metal containing biomolecules.1 51 53 54 56-59 The authors consider trace metals, metalloids, P and S (so-called... 

Recent trends in phosphorus speciation utilizing separation techniques considering HLPC, CE and gel electrophoresis in ICP-MS have been examined by Shah and Caruso.115 For speciation studies, ICP-MS of phosphorus is combined with a biomolecular mass spectrometric technique such as (ESI- or MALDI-MS).116-118... 

Barrio et al. [137] used pyrolysis-gas chromatography to study organic matter evolution in sewage sludge-amended soils. Nitrogen-phosphorus specific flame ionisation and mass spectrometric detectors were used. 

Psathaki, M., E. Manoussaridou, and E.G. Stephanou (1994). Determination of organophosphorus and triazine pesticides in ground-and drinking water by solid-phase extraction and gas chromatography with nitrogen-phosphorus or mass spectrometric detection. /. Chromatogr. A, 667 241-248. 

In a competing and novel type of photoreaction, aroyl diphenyl phosphines 1d - k yield diphenylphosphinous acid (4, diphenylphos-phine oxide) as the photoproduct of a complex transfer of the oxygen from the carbonyl carbon onto the phosphorus atom followed by C-P-bond cleavage and hydrogen abstraction from solvent. The mass spectrometric product analysis of an u.v. irradiation experi-... 

Organopho sphorus pesticides Nitrogen phosphorus and mass spectrometric detectors GC-MS [206]... 

The organic derivatives of P, As, Sb and Bi have been the subject of a large number of mass spectrometric investigations. References for these works can be found in the periodical Mass Spectrometry. The mass spectral characteristics of these compounds, the most studied of which are the phosphorus derivatives, have also been reviewed . ... 

The third type can involve a variety of physical techniques, such as infrared or mass spectrometric detection of nerve agents, or the measurement of the amount of phosphorus in a sample of air. 

Nuclear magnetic resonance and mass spectrometric studies on the novel ring system (26) indicate that there is intramolecular co-ordination between the phosphorus and tin atoms... 

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