Determination of Aromatic Pollutants in Tap Water by a Gas Chromatograph Equipped with a Finger-sized Atomic Emission Detector Using Deuterated Internal Standards

作者：Hirano Ryutaro^*; Nakagama Tatsuro; Nakajima Hizuru; Zeng Hulie; Uchiyama Katsumi

来源：Bunseki Kagaku, 2012, 61(9): 755-761.

DOI：10.2116/bunsekikagaku.61.755

• gas chromatography
• atomic emission detector
• deuterated internal standard

Aromatic pollutants (toluene, chlorobenzene, 1,2-dichlorobenzene and 1,4-dichlorobenzene) and their deuterium substitutes were determined by a gas chromatograph equipped with a finger-sized atomic emission detector (AED) using helium radio-frequency plasma. Incomplete spectral separation between the atomic emissions of hydrogen and deuterium at 656.28 nm and 656.10 nm, respectively, was performed using a small CCD spectrometer (optical resolution : 0.035 nm). The emissions were, however, possible to be measured separatively, due to complete gas-chromatographic separation between the aromatics and their corresponding deuterium substitutes using a GC capillary column. When the flow rate of the make-up (helium) gas, applied power and frequency were optimized to be 5 mL min(-1), 20 W and 220 kHz, respectively, the detection limits (3 sigma) of hydrogen in toluene and deuterium in toluene-d(8) were estimated to be 28 pg and 42 pg, respectively. The aromatic pollutants in tap water extracted by head-space solid-phase microextraction were successfully determined by the GC-AED at the ppb level using deuterium-substituted surrogated compounds as the internal standards.

• 出版日期2012-9