Studies On Origin Processing Methods Of Poria Cocos(schw.)wolf And Analysis Of The Major Harmful Substances

Objective:Poria cocos (Schw.) Wolf commonly used as traditional Chinese medicine. This experimental study used Poria from Jingzhou, Hunan province as medicinal material for the experiment, and carried out origin processing methods of poria and analysis of the major harmful substances, establish the processing of poria technology and quality of evaluation method.Methods and results:Poria processing methods:Using UV determinate water-soluble sugar, alkali-soluble sugar content in fresh Poria,repeated sweating, refrigeration, cold steamed slightly processed samples of Poria,using HPLC determinate pachymic acid, and using the rate of pan-fried, the appearance of pieces of Poria as inspection targets,to evaluate the merits of the four processing methods, results showed that the refrigeration method is better.Inspection of the related indicators of four processing methods produced white Poria:Comparising the indicators of the rate of pan-fried, poria water-soluble sugar, alkali-soluble sugar Poria, Poria acid content, the appearance of sliced of the white poria producted by four methods, Use a method of an integrated evaluation, the results show that the refrigeration method is better; through determination of the boil material and the polysaccharide content in different specifications of the white Poria, the experimental results showed that when white poria first smash into the decoction is in favor of the fried ingredients.Poria drying methods:Using moisture, smooth pieces, the pieces color, pachymic acid as the indicators for the evaluation,Comparison of dried, dry, electric drying, far-infrared drying, vacuum drying the merits and demerits of the five drying methods,results showed that the far-infrared drying method is better, and then using L9(34) orthogonal experiment preferred far-infrared drying process conditions, select the drying temperature, drying time, thickness of study factors, fry a selection rate of alkali-soluble sugar, poria acid, sliced indicators for the evaluation of appearance, optimization a far-infrared drying method for the optimum A2B1C2,that is, a temperature of 60℃, time for 4 h and a thickness of 1.5 cm.Comparison Yunnan and Jingzhou production poria Samples th edifferences of lead residue:Applicating atomic absorption spectrop-hotometer and using graphite furnace method to determinate lead r esidues in Yunnan and Jingzhou poria samples. The results show th at the lead residues in the Yunnan and Jingzhou poria Samples are both less than 5ppm, The results are in line with the provisions of the limits of requirements in our country.Comparison Yunnan and Jingzhou production poria Samples the differences of BHC:Using gas chromatography to determinate the BHC residues in Yunnan and Jingzhou poria Samples, results show that the BHC residues in the Yunnan and Jingzhou poria Samples are both less than 0.2ppm, The results are in line with the provisions of the limits of requirements in our country.Conclusion:The appropriate processing methods are the refrigeration method, drying method should choose far-infrared drying, and its optimum conditions for A2B1C2, that is, a temperature of 60℃, time for 4 h and the accumulation of a thickness of 1.5 cm; The lead and BHC residues in Yunnan and Jingzhou Poria samples are both in line with the provisions of the limits of requirements in our country.