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2012 / ȣ: V.24,no.4,Dec |
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Process Balance of Natural Indigo Production based on Traditional Niram Method |
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Process Balance of Natural Indigo Production based on Traditional Niram Method |
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Younsook Shin, Dong Il Yoo1 and Kangwha Kim2 |
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Younsook Shin, Dong Il Yoo1 and Kangwha Kim2 |
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Chonnam National University |
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Chonnam National University |
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253 ~ 259 : 7 |
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English |
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Abstract: In this work, the natural indigo production process from Polygonum tinctorium was balanced based on the
traditional Niram method in Korea. A standard procedure was determined considering the conditions of indican extraction from
plant material, the amount of alkali for precipitation, storage of extract, etc. The effect of experimental conditions on the yield
of crude dye was investigated. The contents of indigo and indirubin of the crude dyes were analyzed by HPLC. Increase of the
amount of crude dye was observed within 1?2.5 days of extraction time. Longer extraction beyond 2.5 days resulted in a slight
decrease in the amount of crude dye. There was no consistency in terms of indigo content depending on extraction pH. We
found that the storage of extract or harvested plants affected adversely to dye yield and dye quality. Based on the lab scale
extraction, large scale extraction was performed for 2?2.5 days in water and 2.0?2.5 g/L of Ca(OH)2 was applied for precipitation
of indigo dye. We obtained natural indigo dye containing about 15% of pure indigo in scale?up production using whole plant
except root. |
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Keywords: Polygonum tinctorium, Niram, indican, indigo, indirubin |
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Reference |
http://www.koreascience.or.kr/article/ArticleFullRecord.jsp?cn=OSGGBT_2012_v24n4_253 |