Qingdao Zhenzheng Analytical
Instrument Co., LTD
Mobile: 15963292045
Email: qdzhenzheng@163.com
QQ: 2776447184
Add: Building 27, International Industrial Park,
Shandong University, No.669 East China Road,
High-tech Zone, Qingdao
Website: www.qdzhenzheng.com
Analysis of 7 nitrobenzene in water samples by SPME-GC-TSDorECD
Qingdao Zhenzheng Analytical Instrument Co., LTD. Technical department
SPMEProbe item number：ZZ-SPME-06-s
Analysis condition: 
Samples: 10 ml water samples with 2 ng/ml nitrobenzene concentration
Extraction temperature: 40 ºC; Extraction time: 30 min; Mixing speed: 600 rpm; Salt concentration: 30%, w:v
Desorption time: 3 min; Desorption temperature 250 ºC
Columns: CP-SIL (Varian, USA) 11 m ×0.25 mm ×0.25 µm
Inlet: 250 ºC, no shunt injection;
Carrier gas: nitrogen, flow rate 3 mL/min
Programmed temperature rise: 40 ºC for 2 min, 15 ºC/min to 160 ºC, 20 ºC/min to 250 ºC for 3 min
Detector: TSD or ECD
GC-TSD chromatogram
Linear range, linear correlation coefficient, minimum detection limit and repeatability
Analytes | Linear range (mg L-1) | Correlation coefficient (r) | LOD (ng/L) | RSD (n=5, %) | ||||
TSD | TSD | TSD | ECD | TSD | ECD | 2 mg/L | 10 mg/L | |
NB | 0.1-10 | 0.9991 | 0.9991 | 0.9990 | 16 | 0.3 | 5.3 | 2.4 |
2-NT | 0.1-10 | 0.9976 | 0.9976 | 0.9970 | 14 | 0.59 | 7.3 | 5.3 |
4- NT | 0.1-10 | 0.9974 | 0.9974 | 0.9935 | 8 | 0.24 | 6.8 | 3.0 |
1,3-DNB | 0.1-10 | 0.9982 | 0.9982 | 0.9980 | 38 | 0.43 | 5.7 | 1.1 |
2,6-DNT | 0.1-10 | 0.9985 | 0.9985 | 0.9992 | 27 | 0.05 | 5.1 | 0.7 |
2,4-DNT | 0.1-10 | 0.9992 | 0.9992 | 0.9997 | 22 | 0.06 | 5.5 | 0.9 |
TNT | 0.5-10 | 0.9981 | 0.9981 | 0.9981 | 126 | 0.09 | 9.3 | 2.2 |
Actual Water Sample Test Results (TSD)
Analytes | Real sample | Recovery (%, RSD %, n=3) | ||
Seawater | Groundwater | Seawater | Groundwater | |
NB | ND | ND | 103.3 (7.1) | 90.7 |
2-NT | ND | 0.81 | 91.7 (11.9) | 90.7 |
4- NT | ND | ND | 96.7 (8.5) | 94.0 |
1,3-DNB | ND | ND | 102.3 (6.4) | 104.7 |
2,6-DNT | ND | ND | 91.2 (6.2) | 102.6 |
2,4-DNT | ND | ND | 94.1 (6.5) | 100.2 |
TNT | ND | 5.36 | 100.3 (4.7) | 114.9 |
Qingdao Zhenzheng Analytical Instrument Co., LTD
Tel: 15963292045 Email: qdzhenzheng@163.com
QQ: 2776447184 Add: Building 27, Shandong University International Industrial Park, No.669 East China Road, High-tech Zone, Qingdao
Technical support:浩瀚网络 Record number:鲁ICP备14019093号-1
Web address: www.qdzhenzheng.com
