scholarly journals Distribution of butyltin species in sediment samples collected from Saigon habours in Ho Chi Minh city

2017 ◽  
Vol 1 (T2) ◽  
pp. 90-100
Author(s):  
Dong Van Nguyen ◽  
Quang Xuan Ngo
Keyword(s):  
Analytical Method ◽  
Chromatographic Separation ◽  
Sediment Sample ◽  
Degradation Products ◽  
Mass Spectrometric ◽  
Mass Spectrometric Detection ◽  
Ho Chi Minh City ◽  
Sediment Samples ◽  
Gas Chromatographic Separation ◽  
Sediment Matrix

In this study, the distribution of tributyltin (TBT) and its degradation products, dibutyltin –DBT and monobutyltin – MBT in sediment sample collected adjacent Saigon habours was studied using gas chromatographic separation/ mass spectrometric detection. Sediment samples at 12 sites along the Saigon river were taken during dry and raining seasons in 2014 and 2015. Butyltin species were extracted from sediment matrix using HBr-tropolone into dichloromethane followed by ethylation with NaB(C2H5)4 in hexane. The reliability of the analytical method for butyltin species was evaluated by the use of the certified reference BCR-646 material. The concentrations of TBT, DBT and MBT in sediment samples were <0.1–2.81 ng/g, <0.1–4.3 ng/g and <0.2–8.4 ng/g (as Sn, dw). Butyltin species in sediment samples at sites within the habour area were higher than those at sites far upstreams or down-streams of the habours. Low values in TBT/(DBT+MBT) ratios revealed that the discharge of TBT from fouling paint was low at recent years.

On-Line Overpressure Thin-Layer Chromatographic Separation and Electrospray Mass Spectrometric Detection of Glycolipids

2003 ◽  
Vol 75 (1) ◽  
pp. 118-125 ◽  
Author(s):  
Wengang Chai ◽  
Christine Leteux ◽  
Alexander M. Lawson ◽  
Mark S. Stoll
Keyword(s):  
Thin Layer ◽  
Chromatographic Separation ◽  
Mass Spectrometric ◽  
Mass Spectrometric Detection ◽  
On Line

Investigation of the Love Canal Area of the Niagara River for the Presence of Unknown Organic Contaminants

1982 ◽  
Vol 17 (1) ◽  
pp. 103-116 ◽  
Author(s):  
F.I. Onuska ◽  
K.A. Terry
Keyword(s):  
Qualitative Analysis ◽  
Organic Contaminants ◽  
Mass Range ◽  
Mass Spectrometric ◽  
Mass Spectrometric Detection ◽  
Current Profile ◽  
Minimum Requirement ◽  
Niagara River ◽  
Extraction And Separation ◽  
Gas Chromatographic Separation

Abstract A qualitative analysis of organic contaminants in the Niagara River water by high resolution wall coated open tubular column (WCOT) gas chromatography with selective mass spectrometric detection is described. Qualitative analysis of organic pollutants in water is rather a complex task. After the collection of a large Volume of a water sample, the sample is usually run through several extraction and separation steps before identification. During these manipulations, losses of compounds may occur or new impurities may be introduced with various solvents. Therefore, simplification of this procedure is required. This paper describes the detection of all of the major compounds by gas Chromatographic separation combined with mass spectrometric detection (GC-MS). A major advantage is the minimum requirement for cleanup and the injection of a particular fraction extract onto the WCOT column. Dedicated mass Chromatograms of preselected masses at the mass range of the total ion current profile have been used for comparative measurements and identification. For the detection of trace pollutants, a preliminary separation into acidic, neutral, and basic fractions results in simplification of the analysis.

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