Graphitized carbon black columns for high-performance liquid chromatography

Ciccioli, P.; Tappa, R.; Corcia, Antonio Di; Liberti, A.

doi:10.1016/s0021-9673(00)82603-5

Cited by 42 publications

(9 citation statements)

References 6 publications

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“…The solid phase extraction of these analyres from water has been performed with silica, which is a well known example of a solid phase using adsorption mechanism. Some years ago, Graphitized Carbon Black (GCB) was studied as a selective adsorbent to extract organic compounds of varied chemical nature from water samples [11][12][13][14] and retention mechanisms on GCB columns have been fully discussed. The exact mechanism involved in the chromatographic process is not well defined.…”

Section: Introductionmentioning

confidence: 99%

On-line determination of bipyridylium herbicides in water by HPLC

1997

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Key WordsColumn liquid chromatography Solid phase extraction Graphitized carbon black Diquat, paraquat and difenzoquat SummarySelective on-line solid phase extraction (SPE) and liquid chromatography determination (HPLC) of diquat, paraquat and difenzoquat from environmental water samples has been accomplished with Graphitized Carbon Black (GCB) as both extraction and analytical columns. The method involved passing of 50 mL of water through a cartridge filled with Carbograph. In the elution step, the herbicides were transferred from the cartridge to the analytical column (Hypercarb) by mean of a gradient of pH 3 aqueous solution of tetramethylammonium hydroxide (TMAOH) and ammonium sulphate and methanol. Hypercarb columns were found to give a low probability of false positives for bypiridylium herbicides and are very selective for polar compounds. Recovery was better than 80 %. The breakthrough volume was studied with distilled water spiked with the herbicides at various concentration levels (from 0.1 to 20 ktg L-I). The limits of quantification of the method were lower than 0.1 ktg L -1. The total analytical method was applied to surface waters from Torreblanca Nature Park (CasteU6, Spain).

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Section: Introductionmentioning

confidence: 99%

On-line determination of bipyridylium herbicides in water by HPLC

1997

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“…Analyses of graphs of h vs. c for vari ous carbon columns show that opti mum performances within the above limits are obtained for solutes having a capacity factor smaller than two (24,33) with one exception (smaller than 10) (22).…”

Section: Chromatography On Carbon Columnsmentioning

confidence: 83%

“…Ciccioli et al (22) used commercial graphitized carbon black, Carbopack B, made from saran active carbon. Particle size was d p > 20 μπι.…”

Section: Preparation Of Carbons For Hplcmentioning

confidence: 99%