| Title |
Investigation of N-nitrosamines using GC-MS/MS in Han-river Water Supply Systems |
| Authors |
윤우현 ( Woo-hyun Yoon ) ; 이준호 ( Jun-ho Lee ) ; 이현주 ( Hyun-ju Lee ) ; 이수원 ( Su-won Lee ) ; 안재찬 ( Jae-chan Ahn ) ; 김복순 ( Bog-soon Kim ) |
| DOI |
https://doi.org/10.15681/KSWE.2016.32.5.410 |
| Keywords |
Drinking water; GC-MS/MS; NDMA; N-nitrosamines; Tap water |
| Abstract |
This study was conducted to improve the analysis method used for N-nitrosamines and to investigate the occurrences of N-nitrosamines in tributaries of the Han-river, intake stations, water treatment plants and tap water used within the city of Seoul. The samples were pretreated through a solid phase extraction and analyzed using a gas chromatography tandem mass spectrometer (GC-MS/MS). The GC-MS/MS in CI mode was compared with the GC-MS/MS in EI mode by the method detection limits (MDLs). MDLs by GC-CI/MS/MS and GC-EI/MS/MS were 0.2 ~ 1.1 ng/L and 0.2 ~ 1.4 ng/L, respectively. Samples were collected from ten tributaries of the Han-river (T1 ~ T10), six intake stations (II ~ 16), six water treatment plants (P1 ~ P6) and 25 taps in Seoul city. The maximum levels of N-nitrosodimethylamine (NDMA) were 0.013 ㎍/L, 0.008 ㎍/L, 0.006 ㎍/L and 0.002 ㎍/L in tributary water, raw water, finished water and tap water samples, respectively. Detected levels were much lower than 0.1 ㎍/L corresponding to the guideline value of WHO. |