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quantitative definition of oxidable Polyphenolums

Often applied to quantitative definition of sum pos in vegetative raw materials is permanganatometricheskoe titration in priyosutstvii indigosulfokisloty (method Leventalja in A.L.hen's paravariation sanova) [48].

Nearby 1 g (exact naveska) the minced propagules of a Labrador tea, prohoyodjashchih through a sieve with a diameter less than 1 mm, placed in a pencil-point flask capacity of 500 ml, filled in 250 ml nagretoj before boil of water and boiled with an anatropic refrigerator within 30 minutes at periodic peremeyoshivanii. Fluid cooled to a room temperature and filtered about 100 ml in a pencil-point flask capacity of 200-250 ml through cotton wool so that raw materials particles have not got to a flask. Then culled the pipet of 20 ml poyoluchennogo extractions in other pencil-point flask capacity of 750 ml, added 500 ml of water, 25 ml indigosulfokisloty and titrated at poyostojannom hashing by solution of permanganate of a potassium (0,02 mol/l) to zo -

Lotisto-yellow staining. In parallel spent a check experiment. The quantitative maintenance of the sum oxidable polyphenolic to a soya

Unifications counted under the formula:

(And-) h To h 0,004157 h 100 h Ю0

H, % =-------------------------------------------------------------------------, where

And h b

And - quantity 0,1 n solution of permanganate of the potassium which has gone on titration, ml; In - quantity 0,1 n solution of permanganate of the potassium which has gone on konyotrolnyj experience, ml; To - allowance quotient to titer 0,1 n solution peryomanganata a potassium, g; 0,004157 - quantity of oxidable materials, sootvetstyovujushchee 1 ml 0,1 n solution of permanganate of a potassium, g; 100 - volume of the measured flask taken for analysis, ml; and - volume of the water extraction taken for analysis, ml; b - naveska vegetative raw materials,

The metrological characteristic of quantitative definition pos farmakopejnym is resulted by a method in table 3.22.

Table 3.22

The metrological characteristic of quantitative definition of polyphenolic oxidable bonds

p f X S2 S Sx R, % t (p, f) AH є, %
10 9 6,590 0,089 0,298 0,094 95 2,26 0,213 3,23

The error of quantitative definition of sum pos a method permanga - natometrii has averaged 3,23 %.

3.2.7.

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Scientific source Korotayeva MARINA SERGEEVNA. FARMAKOGNOSTICHESKY STUDYING of FOUR KINDS of SORT LEDUM L. The dissertation on competition of a scientific degree of the candidate of pharmaceutical sciences. Yaroslavl -. 2006

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