รายละเอียดวารสารวิชาการ

  1. หน้าแรก
  2. รายชื่อนักวิจัย
  3. วรพรรณ พรมศิลา
  4. ข้อมูลวารสารวิชาการ

ชื่องานวิจัย ( Article Name)

Lower density solvent based dispersive liquid liquid microextraction for the determination of benzoic acid

บทคัดย่อ ( Abstract )

A lower density solvent-based dispersive liquid-liquid microextraction (DLLME) was optimized for the determination of benzoic acid in fruit juices by HPLC-UV method. The type and volume of lower density of extraction and dispersive solvents were investigated. A 0.5 mL octanol was found to be an optimal extraction solvent, and a 2.0 mL acetonitrile was suitable as dispersive solvent. An extraction procedure was applied for extraction of benzoic acid from three orange juice samples, which was purchased from the local market. An optimal HPLC condition was achieved under a mixture condition of methanol and 1% acetic acid (97 and 3) was found as an optimal mobile phase. The method was validated under the optimized conditions of the extraction and the determination. The good linearity with R2 0.9939 was obtained in the concentration range of 25 - 1000 mg/L. The relative standard deviations (%RSD) of retention time and peak area were acceptable. The LOD was 2.2 mg/L and the recovery was satisfied (104±7%). The results show that the extraction and the determination were efficient for determining of benzoic acid.

เอกสารวิจัย ( Paper )

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ผู้เขียน ( Authors )

ข้อมูลการเผยแพร่ ( Journal Infomation )