跳转至内容

CN

Determination of chlorophenols in honey samples using in-situ ionic liquid-dispersive liquid-liquid microextraction as a pretreatment method followed by high-performance liquid chromatography.

Determination of chlorophenols in honey samples using in-situ ionic liquid-dispersive liquid-liquid microextraction as a pretreatment method followed by high-performance liquid chromatography.

Food chemistry (2014-12-23)

Chen Fan, Nai Li, Xueli Cao

摘要

In-situ ionic liquid-dispersive liquid-liquid microextraction (IL-DLLME) method was developed as a pretreatment method for the detection of six chlorophenols (CPs) in honey samples. The hydrophobic ionic liquid [C4MIM][NTf2], formed in-situ by the hydrophilic ionic liquid [C4MIM][BF4] and the ion exchange reagent LiNTf2 was used as the microextractant solvent of CPs from honey sample. Then the enriched analytes were back-extracted into 40 μL of 0.14 M NaOH solution and finally subjected to analysis by high-performance liquid chromatography. The method showed low limit of detection of CPs, 0.8-3.2 μg/L and high enrichment factor, 34-65 with the recoveries range from 91.60% to 114.33%. The method is simple, rapid, environmentally friendly and with high extraction efficiency.

材料

货号

品牌

产品描述

Sigma-Aldrich

乙腈, suitable for HPLC, gradient grade, ≥99.9%

Sigma-Aldrich

磷酸, ACS reagent, ≥85 wt. % in H₂O

Sigma-Aldrich

乙腈, anhydrous, 99.8%

Sigma-Aldrich

乙腈, ACS reagent, ≥99.5%

Sigma-Aldrich

乙腈, for HPLC, for UV, ≥99.9% (GC)

Sigma-Aldrich

磷酸, 85 wt. % in H₂O, 99.99% trace metals basis

Sigma-Aldrich

磷酸, ACS reagent, ≥85 wt. % in H₂O

Sigma-Aldrich

乙腈, suitable for HPLC, gradient grade, ≥99.9%

Sigma-Aldrich

磷酸, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥85%

Sigma-Aldrich

磷酸, puriss. p.a., crystallized, ≥99.0% (T)

Sigma-Aldrich

磷酸, crystalline, ≥99.999% trace metals basis

Sigma-Aldrich

乙腈, suitable for HPLC-GC, ≥99.8% (GC)

Sigma-Aldrich

磷酸溶液, 85 wt. % in H₂O, FCC, FG

Sigma-Aldrich

磷酸, puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, 85.0-88.0%

Sigma-Aldrich

磷酸, BioUltra, ≥85% (T)

Sigma-Aldrich

乙腈, biotech. grade, ≥99.93%

Sigma-Aldrich

4-氯苯酚, ≥99%

Sigma-Aldrich

磷酸, ≥85 wt. % in H₂O, ≥99.999% trace metals basis

Sigma-Aldrich

乙腈, ReagentPlus^®, 99%

Sigma-Aldrich

磷酸, BioReagent, suitable for insect cell culture, 85%

Sigma-Aldrich

2,4,6-三氯苯酚, 98%

Supelco

乙腈, Pharmaceutical Secondary Standard; Certified Reference Material

Sigma-Aldrich

乙腈, electronic grade, 99.999% trace metals basis

Sigma-Aldrich

2-氯苯酚, ≥99%

Sigma-Aldrich

2,4-二氯苯酚, 99%

Sigma-Aldrich

乙腈, suitable for DNA synthesis, ≥99.9% (GC)

Sigma-Aldrich

2,6-二氯苯酚, 99%

Sigma-Aldrich

乙腈, ≥99.5% (GC)

Supelco

乙腈, analytical standard

Sigma-Aldrich

磷酸溶液, NMR reference standard, 85% in D₂O (99.9 atom % D), NMR tube size 4.2 mm × 8 in. , WGS-5BL Coaxial NMR tube