The Investigation Of Main Metallic Elements In Radix Puerariae And Planting Soil From Dali

Objective (1) To understand and analyze contents distribution of mainmetal elements in Radix Puerariae Samples from Dali;(2) To understandand analyze contents distribution of main metal elements in planting soilof Radix Puerariae from Dali;(3) To supplement and improve the thecorresponding minerals quality defined of Radix Puerariae in Dali, toevaluate the heavy metals in Radix Puerariae and planting soil samplesfrom Dali.Methods (1) Stratified sampling method, to survey9sites,whereplanting Radix Puerariae in Dali, to determine the correspondingtownships in Weishan, Xiangyun, Jianchuan, Heqing, Dali City as theresearch areas, to sampling the Radix Puerariae and the correspondingplanting soil as research samples;(2) To detect metal elements in thetest samples by Flame Atomic Absorption Spectrometry (FAAS), twelvemetallic elements included potassium, calcium, magnesium, zinc, copper,iron, cobalt, chromium, lead, cadmium, manganese, nickel;(3) Toestablish a database through Excel, to analyze data through SPSS17.0software;(4) To anylize and evaluate the results. Results1. In generalThe samples were representativeness, the study did not analyze themorphology of the metallic elements, contents measured of the metallicelements were actually main forms under natural conditions.2. The results of metallic elements measuredCalcium, potassium, magnesium and other metal elements of RadixPuerariae from Ddli were in high levels; Cadmium was not detected in RadixPuerariae and planting soil.The contents of metallic elements in peels of Radix Puerariae fromDdli were often higher than in Radix Puerariae (peeled).The contents of eleven metallic elements measured in Radix Puerariaeand planling soil from Ddli were not same in sort.Compared Radix Puerariae with planting soil from Ddli: contents ofcopper were not significent difference; Contents of potassium, calcium,magnesium and cobalt in Radix Puerariae were higher; And contents of iron,manganese, zinc, nickel, chromium, lead in Radix Puerariae were lower.The content of cobalt in researched soil was12.40±7.88ug/g.In the Radix Puerariae and planting soil from Ddli, contents of mostof the measured metal had different geographical distribution.In the three types of soil that planting Radix Puerariae in Dali,the contents distribution of8kinds of metallic elements all hadsignificent different.3. Correlation analysis of metallic elementsSimple correlation analysis showed that10kinds of metallicelements all as a positive correlation (except copper) in Radix Puerariae(peeled) and Radix Puerariae peel in Dali.Simple correlation analysis showed that the metal elements measuredin planting Radix Puerariae soil mostly showed positive correlations, and those relationships were complex; Potassium-calcium tended anegative correlation. The values of|r|were often from0.437to0.834,mostly in moderate intensity degrees.Multiple correlation analysis showed that the metallic elementsmeasured in planting Radix Puerariae soil were mostly positive related,the potassium-calcium was still negative correlation. Absolute valuesof the partial correlation coefficient ranged from0.462to0.888, andmajority in moderate intensity degrees. Compared to simple correlationanalysis, multiple correlation analysis slightly enhanced correlationsbetween related metallic elements. The strongest correlation was iniron-potassium, lead-copper had a relative lesser degree.There were not significent correlationships for Manganese-iron andlead-calcium in the simple correlation analysis, but individuallyshowed a positive correlationship and negative correlationship in themultivariate analysis.4. The quality evaluation of heavy metal contents in planting RadixPuerariae soil and Radix Puerariae from DaliIn corresponding soil, cadmium was not detected，and reached thefirst-class standards of the national Environmental Quality Standard forSoils; The contents of zinc, copper, chromium, nickel,4kinds of heavymetals all reached the first-class standards; And the contents of leadreached second-class standards; The contents of heavy metal cobalt inplanting Radix Puerariae soil were in the normal values based on the soilbackground in Yunnan Province.The average contents of lead, copper, cadmium meet medicinal plantstandards of GAP in the Radix Puerariae, lead and copper had samplesexceeded standard. Based on GAP,37.7%(20/53)of Radix Puerariae (peeled)exceeded the standard in lead,32.1%(17/53)of Radix Puerariae peelexceeded the standard in lead. In Radix Puerariae peel, the rate of exceeding copper was1.9%(1/53), only one Wei2sample exceeded copperstandard, the rate of exceeding copper was25%(1/4) in Wei2.Conclusions1. The potassium, calcium,magnesium and other metal elements wererich in Radix Puerariae from Dali.2. The contents of11metallic elements measured were different insort in Radix Puerariae and plantling soil from Ddli.3. The contents of metals measured in Radix Puerariae (except leadin Radix Puerariae skin) all showed statistical significant differencesin the different places.4. Compared Radix Puerariae and planting soil from Ddli: only thecontents of copper had not statistical significance. Radix Puerariaehad enrichment for potassium, calcium, magnesium, cobalt; And had notobvious enrichment for iron, manganese, zinc, nickel, chromium, lead.Thecontents distribution of the metallic elements (except magnesium) alsohad statistical significant fifferences in different places. Thecontents of chromium, lead, nickel in three various soil types in threetypes soil of planting Radix Puerariae from Dali were not significentdifferent.5. The contents of the metallic elements measured in Radix Puerariaeskin from Dali were often higher than Radix Puerariae (peeled)，Othermetallic elements in the same contents；Outside of copper, the contentsof10kinds of the metallic elements had positive correlationshipsbetween in the Radix Puerariae (peeled) and in the Radix Puerariae peel.6. There were often positive correlationships between metallicelements in corresponding soil, and there was a negative correlationshipbetween potassium-calcium; Between metallic elements in correspindingsoil, those correlationships often showed multiple. The contents of ametallic element in planting metallic elementsoil influenced by other metals.7. The general situation of soil was well, the contents of measuredheavy metallic elements in planting Radix Puerariae soil from Dali werein the ranges of standards. In the Radix Puerariae from Dali, accordedthe medicinal plant standards of GAP, the average contents of lead,copper, cadmium meet the standards; and some samples lead and/or copperexceeded standards. Based on GAP, the situation of lead exceeded standardwas salient and obvious. The soil that surveyedareas were not polluted by cadmium and cobalt in detected areas.