Tobacco Documents Online

The presence of high concentrations of sulphate ions in co,=ner•cial , ----fertilizers.is due to the sulfuric acid treatment of phosphate ~ tion of insoluble PoS01+ in soil at raised.pl'i should therefore be - rock during fertilizer manufacturing, The possibility of the forma- considered: , _~ Soi1 pH is known to be a prime factor in affecting plant trace metal 'uptake. If the tobacco uptake of Pb-210 and Po-210 is found to be : altered by so11 pH, it may be one explanation for'the wide variations It may also reveal advantages to be gained by incorporation of addi- --tives to fertilizer or soils to better control soil pH. -.• -In Po-210 content found in tobaccos growain all parts of the world. 111. rp-'~1:u anaa ro-eIU todaceo uptatie stuaies to estaelisri conditions x•or growing tobaccos of high Po-2].0 content. the third group 100x,. where x = p curie levels. - administered to the first group i-rill be lx, the second group.lOx and Pb-210 in equilibrium with .its dau;;hter. Po-210. Radioactivity greenhouse conditions. All plants will be fed nutrient solution • for their entire growth period. i,2.ch group of plants, early in its development izill be subjected to a designated amount of radioactive Three groups of tobacco•pl.antts will be grown in quarta sand under A11 tobacco plants will be raised to maturity and analyzed at time of harvest for Fb-210 and Pb-220 content. These results.will establish studies. - growino tobacco of desired Po-210 content to be used in the medical and Po-210, will be used to,establish predictable conditions for A plot of the Po-210 tobacco, uptake with regard'to available Pti-210 Low level Po-210, tobacco data will be supplied from seri es I experiments. the upper levels of Po-210t content which can be obtained in tobacco. ' AHALYTIGr'1L METHODS . Tobacco trace metals., tar and nicotine content Tobacco grown under experimental conditions (photo 2) will be analyzed for trace metals,, tar and nicotine content. Similar analyses of comercial tobaccos will be conducted for co:ipara- tive pruposes. Trace metal analysis will be carr:ted oult using non-d:iestructive slow~ and-fast.nautron ac tivation analysis. The tar and nicotine analyses will be conducted by various methods. 0

Sink with hot and; cold runnirgwate-r 'Distilied'water Bench top, 3'xl0' . . . Fume hood with elec- -~;trical outlets and water ., . 'StoraJe cabinets . " and shelves _ "" . Desk ...i..i: . . ' Greenhouse. aAproximatelv, : :108 square feet .-=Liquid Scintillation .,,Counter, prop. 78798 . '-Ton,Chamber prop`. -ihl49- facilit y --

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210P0 ALPHA SPECTRUM 22 - h®ur c®lwi . I }/Sbb9~5500~ Ol - I I I 1 I I 78 82 86 90 94 98 102 106 108 Ch-I ANR! E L RI UMD C R

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