1. grind or pulverize the peanut shells first. i use a miller for grinding and a standard 40 mesh screen to collect the powder.
2. oven dry the material overnight (105C).
3. in a 100 ml beaker, treat 1g sample with 15 ml of 72% sulfuric acid and set aside for 2 hours. stir occasionally. do this at room temp. (sample turns black)
4. transfer the treated sample in a 1L Erlenmeyer flask and add 560 ml distilled water to make a 3% concentration.
5. gently boil for 2 hours. cover the flask with a small beaker or a reflux condenser if available. (lignin is extracted as a precipitate)
6. vacuum filter using a preweighed glass filter of medium porosity to collect the precipitated lignin.
7. oven dry.
8. compute for % lignin component:
_g lignin/ g sample* 100%
If you have any problems or questions that have anything to do with chemistry, then the resources here can answer your questions.
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