Analysis of Maple Products Composition of the Canadian Lead Precipitate of Maple Sirup 1R.4 E. PUDDIh-GTON AND J. F. SSELL, RIacdonald College, Quebec, Canada
Producteurs de Sucre d’Erable de Quebec, viere diluted concentration of 25 Der cent sucrose. treated with 3050 IT of basic lead acetate reigent,, and allowed to settle 2 hours. rhe supernatant liquid was siphoned off and the precipitate washed three times with 6-liter portions of water. The precipitate was then tramferred t o a Biichner filter, washed several times, dried at 100’ C., and veighed; the yield of 300 grams was approxiniately that to be expected from sirup of Canadian lead value 3.93, the procezs being as close an approximation as practicable to that used analytically.
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E T E R M I S A T I O K S published by Fowler and Snell in 1929 (4) of total lead, basic lead, carbon, hydrogen, acid equivalents, and malic acid (polarimetric) in the precipitate produced in the Canadian lead method of analysis of maple sirup ( 2 ) showed t h a t while the sum of the lead malate (equivalent to 97 per cent of the organic acids) and the lead oxide accounts for some 84 per cent of the precipitate, the carbon of the malate amounts to little over half that found by combustion, thus indicating the presence of some highly carbonaceous constituent or constituents. The present paper reports a qualitative search for the organic constituents of the precipitate. The quantitative data included in this paper are to be regarded merely as rough approximation
