[PDF] Top 20 ISOTOPE DETERMINATION OF SULFUR BY MASS SPECTROMETRY IN SOIL SAMPLES
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ISOTOPE DETERMINATION OF SULFUR BY MASS SPECTROMETRY IN SOIL SAMPLES
... conversion of organic S to sulphate by various methods was described elsewhere (Krouse et ...complexity of the organic matrix of the soil hampers the procedures of sample ... See full document
7
Use of a Natural Sorbent as Alternative Solid-Phase Microextraction Coating for the Determination of Polycyclic Aromatic Hydrocarbons in Water Samples by Gas Chromatography-Mass Spectrometry
... use of bracts as a natural sorbent in solid-phase microextraction was exploited for use in the determination of polycyclic aromatic hydrocarbons in water samples with ... See full document
9
Determination of amphetamines-type stimulants in urine samples using microextraction by packed sorbent and gas chromatography-mass spectrometry
... resulted in greater recoveries for the amphetamines under ...differed in the washing solution. Nevertheless, washing with water followed by water: methanol (95:5) (T3) gives greater recoveries when ... See full document
70
J. Braz. Chem. Soc. vol.21 número4
... quantiication by online isotope dilution inductively coupled plasma mass spectrometry ...Online isotope dilution (ID) herein refers to strategies promoting the addition of ... See full document
15
Determination of cyclophosphamide in human urine by HPLC coupled to tandem mass spectrometry
... Biological samples urine are much more complex due to presence of proteins, salts, acids, bases and various organic compounds with similar chemistry to analytes of ...biological samples have ... See full document
49
ULTRASOUND-ASSISTED EXTRACTION FOR COLORIMETRIC DETERMINATION OF IRON IN SOIL: A COMPARISON WITH INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY.
... COLORIMETRIC DETERMINATION OF IRON IN SOIL: A COMPARISON WITH INDUCTIVELY COUPLED PLASMA MASS ...colorimetric determination of iron in soil samples ... See full document
5
Determination of Parabens in Breast Milk Samples by Dispersive Liquid-Liquid Microextraction (DLLME) and Ultra-High-Performance Liquid Chromatography Tandem Mass Spectrometry
... milk samples were collected from volunteer lactating mothers assisted at the Reference Center for Women’s Health of the Nursing School of Ribeirão Preto, University of São Paulo (USP), ...milk ... See full document
12
Paint samples preparation methods for metals and methaloids determination by atomic spectrometry techniques.
... PAINT SAMPLES PREPARATION METHODS FOR METALS AND METHALOIDS DETERMINATION BY ATOMIC SPECTROMETRY ...elements determination. Three methods were investigated: (1) decomposition in ... See full document
10
Rev. bras. saúde ocup. vol.42 suppl.1 rbso 42 e1s
... substance of recognized toxicity and its biomonitoring of exposure becomes critical for preventing health damages, especially in occupational exposure ...biomarkers of exposure, ... See full document
14
Determination of Pesticide Residues in Banana by Using High Performance Liquid Chromatography and Gas Chromatography-Mass Spectrometry
... occurrence of endosulfan, carbendazim, chloropyripos in 10 banana samples in southern area of Tamilnadu, India (hill banana, karpuravalli, monthan, nendran, ney poovan, pachanadan, ... See full document
6
J. Braz. Chem. Soc. vol.12 número4
... occurrence of the endocrine disruptor compounds, such as 4-nonylphenol isomers and bisphenol A was determined in surface water samples from ...preconcentration of 200 mL of water sample ... See full document
6
Deletion of Genes Encoding Arginase Improves Use of "Heavy" Isotope-Labeled Arginine for Mass Spectrometry in Fission Yeast.
... that in car2Δ arg1-230 lys3-37 cells labeled with Arg-6, a similar arginine conversion should be observed; in this case, however, one would expect a portion of the Arg-6 pool to be converted to ... See full document
14
ORGANIC SULFUR OXIDATION TO SULFATE IN SOIL SAMPLES FOR TOTAL SULFUR DETERMINATION BY TURBIDIMETRY
... O S no solo pode ocorrer como S-orgânico e S-inorgânico, sendo a forma orgânica responsável por 95 % do S na maioria dos solos. A eficiência da oxidação do S-orgânico a sulfato, na determinação de S-total em amostras de ... See full document
7
Determination of Trace Metals in Electrolytic Copper by ICP OES and ICP-MS
... techniques. In this sense, the determination of trace metals in copper samples can be difficult by the presence of high quantities of copper in solution, ... See full document
7
Determination of polycyclic aromatic hydrocarbons in soil by gas chromatography-mass spectrometry
... [r] ... See full document
11
DETERMINATION OF TIN IN ENVIRONMENTAL SAMPLES BY ATOMIC FLUORESCENCE SPECTROMETRY.
... established by the analysis of certified reference materials and by comparative determinations, using inductively coupled optical emission ...the determination of Sn in ... See full document
7
Mass fingerprinting and electrophysiological analysis of the venom from the scorpion Centruroides hirsutipalpus (Scorpiones: Buthidae)
... respectively, in Fig. 1, were shown to be homo- geneous by mass spectrometry and were used for deter- mination of their primary ...structure of these peptides. Peptide A was se- ... See full document
8
J. Braz. Chem. Soc. vol.21 número6
... portion of slurry previously homogenized was weighed in a 50 mL centrifuge ...milliliters of acetonitrile, containing 1% (v/v) of acetic acid, were then added to the sample, and the mixture ... See full document
6
Determination of As in environmental organic samples by atomic absorption spectrometry with electrothermal atomization after O2 bomb combustion.
... Resultados da determinação de As para materiais certificados de referência, representando amostras orgânicas de interesse ambiental1. Elementos não-voláteis constituintes da matriz do ma[r] ... See full document
4
METALS DETERMINATION BY ATOMIC SPECTROMETRY TECHNIQUES IN COAL AND ASH SAMPLES USING RESPONSE SURFACE METHODOLOGY.
... METALS DETERMINATION BY ATOMIC SPECTROMETRY TECHNIQUES IN COAL AND ASH SAMPLES USING RESPONSE SURFACE ...determinations in coal and ash samples by ... See full document
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