Research Article
Determination of Phthalate Plasticisers in Palm Oil Using Online Solid Phase Extraction-Liquid Chromatography (SPE-LC)
Table 1
Online SPE and LC conditions.
| | Time (min) | Left-pump eluent | Left-valve position | Time (min) | Right-pump reservoir | Right-valve position | | A: 10 mM MSA | B: acetonitrile | C: ethyl acetate | A: deionised water | B: acetonitrile | C: ethyl acetate |
| | 0.1 | 95 | 5 | 0 | 1-2 | 0.1 | 30 | 70 | 0 | 1-2 | | 3.5 | 95 | 5 | 0 | 6-1 | — | — | — | — | 1-2 | | 6.5 | 30 | 70 | 0 | 1-2 | — | — | — | — | 6-1 | | 6.6 | 0 | 0 | 100 | — | — | — | — | — | — | | 10.0 | 0 | 0 | 100 | — | — | — | — | — | — | | 10.1 | 0 | 100 | 0 | — | — | — | — | — | — | | 11.0 | 0 | 100 | 0 | — | — | — | — | — | — | | 11.1 | 5 | 95 | 0 | — | — | — | — | — | — | | | — | — | — | — | 14.0 | 5 | 95 | 0 | — | | 15.0 | 5 | 95 | 0 | 6-1 | — | — | — | — | 6-1 | | | — | — | — | — | 21.0 | 0 | 100 | 0 | — | | | — | — | — | — | 22.0 | 0 | 100 | 0 | — | | | — | — | — | — | 22.1 | 0 | 0 | 100 | — | | | — | — | — | — | 24.0 | 0 | 0 | 100 | — | | | — | — | — | — | 24.1 | 0 | 100 | 0 | — | | | — | — | — | — | 25.0 | 0 | 100 | 0 | — | | 28.0 | 5 | 95 | 0 | — | — | — | — | — | — |
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