This study |
4-MBC |
DI-SPME 25 mL of sample solution at pH 4 with 9% NaCl were transferred to a 40 mL vial and equilibrated before the extraction step. The fiber was immersed in the sample for 70 min at 80 ºC with magnetic stirring at 1000 rpm. After this period, the fiber was quickly immersed in ultrapure water to remove the salt and then immediately inserted into the GC injector for desorption at 260 ºC for 15 min. |
0.1-0.5 |
117a
|
107b
|
9a
|
18b
|
0.03 µg L-1
|
0.1 µg L-1
|
OD-PABA |
0.01-0.05 |
107c
|
67d
|
4c
|
3d
|
0.004 µg L-1
|
0.01 µg L-1
|
99 Benedé, J. L.; Chisvert, A.; Salvador, A.; Sánchez-Quiles, D.; Tovar-Sánchez, A.; Anal. Chim. Acta
2014, 812, 50.
|
4-MBC |
DLLME 5 mL of sample with pH adjusted to 2.54 were subjected to DLLME by rapid injection of 300 µL of pre-mixed solvents (250 µL of acetone and 50 µL of chloroform). After cloudy solutions had formed, they were centrifuged at 3500 rpm for 5 min. After centrifugation, the organic sedimented phases were collected for GC-MS analysis. |
0.1-0.5 |
88 ± 4e
|
82 ± 1f
|
8.1e
|
2.2f
|
10 ng L-1
|
33 ng L-1
|
1616 Wang, T.-E.; Guo, M.; Song, W.-L.; Zhang, Y.-D.; Du, X.-Z.; Anal. Methods
2015, 7, 3385.
|
OD-PABA |
DI-SPME 15 mL of sample were used in the procedure and the N-CNP/SS fiber was immersed in the stirred solution for a period of 50 min at 45 ºC. Subsequently, the fiber was withdrawn from the sample solution and introduced into the SPME HPLC interface for static desorption in the mobile phase. Prior to the next extraction, the N-CNP/SS fiber was immersed in methanol and ultrapure water for 15 and 5 min, respectively, to eliminate possible carry-over. |
0.05-150 |
108g
|
4.83g
|
0.006 µg L-1
|
0.02 µg L-1
|
1717 Song, W.; Guo, M.; Zhang, Y.; Zhang, M.; Wang, X.; Du, X.; J. Chromatogr. A
2015, 1384, 28.
|
OD-PABA |
DI-SPME The extraction was carried out with 15 mL of sample. The prepared fiber coated with Zn-ZnO nanosheets was directly immersed in the sample solution for 40 min at 45 ºC. After extraction, the fiber was removed from the sample solution and immediately introduced into the SPME HPLC interface for static desorption in the mobile phase. Between extractions, the fiber was immersed in methanol and ultrapure water for 10 and 5 min, respectively, to eliminate possible carry-over. |
0.1-200 |
99.5g
|
7.56g
|
0.052 µg L-1
|
- |
1313 Benedé, J. L.; Chisvert, A.; Giokas, D. L.; Salvador, A.; Talanta
2016, 147, 246.
|
4-MBC |
SBSDµE A stir bar was placed in a vial and magnetically stirred for 10 min at a high stirring rate to solvate the nanoparticles. The MNP-coated stir bar was then removed from the solution with clean plastic tweezers, immersed in 25 mL of sample solution adjusted to pH 4 with 5% NaCl and then stirred intensely for 30 min at room temperature. Upon termination of the stirring process, nanoparticles were magnetically collected on the stir bar. The MNP-coated stir bar was then removed with clean plastic tweezers and placed into a glass sample tube for thermal desorption directly-coupled to GC-MS. |
0.1-0.5 |
97 ± 9h
|
8.6h
|
23 ng L-1
|
78 ng L-1
|
OD-PABA |
0.1-0.5 |
88 ± 5h
|
4.4h
|
30 ng L-1
|
99 ng L-1
|
1010 Cunha, S. C.; Pena, A.; Fernandes, J. O.; J. Chromatogr. A
2015, 1414, 10.
|
4-MBC |
DLLME 10 g of water sample at pH of 3 were subjected to DLLME by rapid injection of a mixture of 50 µL of trichloroethane and 1000 µL of acetone. The tube was then sealed and shaken gently by hand for 30 s and centrifuged at 3500 × g for 1 min. A volume of 38 µL of sediment was transferred to an amber vial and internal standard was added. This mixture was evaporated to dryness under a gentle stream of nitrogen. Lastly, the analytes were silylated by addition of 40 µL of BSTFA with 1% TMCS for 5 min in a domestic microwave (600 W) and, finally, 1 µL of the extract was injected into the GC-MS system. |
0.05-50 |
99i
|
93j
|
10i
|
6j
|
6 ng L-1
|
50 ng L-1
|
OD-PABA |
0.01-50 |
79i
|
75j
|
10i
|
7j
|
6 ng L-1
|
10 ng L-1
|
1111 Clavijo, S.; Avivar, J.; Suárez, R.; Cerdà; V.; J. Chromatogr. A
2016, 1443, 26.
|
4-MBC |
In-syringe-MSA-DLLME-GC-MS systemMethod for online extraction, preconcentration, derivatization and chromatographic separation of UV filters. The cleaning of the syringes and manifold was carried out with acetone and ultrapure water. Thus, a possible carry-over was avoided. Optimum conditions: 350 µL of trichloroethylene:BSTFA, 600 µL of acetone volume and stirring time of 160 s. The entire procedure, with simultaneous extraction and derivatization of the analytes and injection into the GC-MS, was performed in 6 min. |
0.20-500 |
104.8k
|
98.7g
|
5.5 |
0.160 µg L-1
|
0.380 µg L-1
|
OD-PABA |
0.40-500 |
111.0k
|
88.4g
|
6.4 |
0.081 µg L-1
|
0.193 µg L-1
|