• Journal of the Korean Chemical Society
• /
• v.30 no.5
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• pp.465-474
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• 1986

The solvent extraction and cleanup processes for the simultaneous gas-liquid chromatographic determination of 11 kinds of organophosphorous pesticide residues in crops were investigated. The extracts dissolved with acetone were partitioned with petroleum ether after adding saturated NaCl solution. Evaporated the partitioning solvent, the residue was dissolved in methylene chloride and eluted through mixed adsorbent (1 : 2 : 4 of activated carbon, magnesia and diatomaceous earth) with methylene chloride as an eluent. The pesticides recovered were 82∼105% and the impurities were effectively removed.

• Applied Chemistry for Engineering
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• v.4 no.3
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• pp.583-590
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• 1993

O-Diethylaminoethyl chitosan containing weak cation exchange group had been synthesized. It was used to separate albumin and lysozyme as stationary phase in liquid chromatography column. The separation of acidic and basic dyes were preliminarily conducted to investigate the effect of polarity parameter of solvents. Based on this result, we investigated various factors on the separation efficiency of chromatography in column. In the case of using water-methanol as cosolvent, the resolution factor depended on the polarity parameter. The best resolution factor was 1.42 for DEAE-chitosan with the degree of substitution of 0.23.

• KSBB Journal
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• v.14 no.4
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• pp.408-413
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• 1999

To separate mixtures analytically and preparatively by LC (Liquid Chormatography), the operating conditions of analytical chromatography should be determined. The HCI program was utilized to find the optimum operating condition accurately and rapidly, and to reduce the number of experiments. In an analytical chromatography, based on the resolution and analysis time, the experimental conditons of deoxyribonucleosides and phopholipids were fixed in terms of taxol was calculated, and the collection time was predicted for the mixture of 5'-IMP and 5'-GMP from the elution profile when and purity wer known.

• Polymer Science and Technology
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• v.14 no.6
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• pp.748-754
• /
• 2003

• Bulletin of Food Technology
• /
• v.22 no.2
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• pp.273-282
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• 2009

• Analytical Science and Technology
• /
• v.6 no.4
• /
• pp.1109-1134
• /
• 1993

• The Science & Technology
• /
• v.27 no.12 s.307
• /
• pp.92-94
• /
• 1994

• Proceedings of the Korean Nutrition Society Conference
• /
• 1998.05a
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• pp.21-21
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• 1998

• The Science & Technology
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• v.27 no.6 s.301
• /
• pp.72-73
• /
• 1994

• Proceedings of the Korean Nuclear Society Conference
• /
• 2001.05a
• /
• pp.384.1-384
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• 2001