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Contentum metallorum gravium in HPMC capsulis concavis non excedunt 10ppm.
Sampling method: Passim ducta exemplaria a productione batches
Expertus methodus: sume residuum sub ignitionis item residuo, adde acidum nitricum 0.5ml, evaporatum et siccum, donec vapor oxydi nitrogeni non amplius emittit, post refrigerationem, adde acidum hydrochloricum 2ml 2ml, pone in balneum aquae ad siccitatem evaporandum, adde aquam 15ml, guttatim adde TS Aconitum ad phenolum album cum levi rubra, adde 2ml=3.5), acetate neslum acetate, adde 2ml=3.5), pone in lavacro aquae ad siccitatem evaporationem, adde aquam 15ml, guttatim adde TS Aconitum ad phenolum album cum levi rubra, adde 2ml=3.5), acetate acetate 2ml acetate. cum aqua ad 25ml dilute et hoc utere ut tubo a.
Transfer the quantity of reagent used to prepare the test solution to a porcelain evaporating dish to evaporate to dryness, add 2 ml of acetate buffer (pH = 3.5) and 15 ml of water, dissolve by heat, transfer to a Nessler colorimetric tube, add a quantity of Standard lead solution, then diluted with water to 25 ml, put this tube into tube B. Add 2 ml of thioacetamide TS to test tube A and test tube B respectively, mix well, let stand for 2 min, respice in axem verticalem tubuli testium in albo background, et colores confer. Contentum metallicum grave est NMT 10ppm (0.0010%).
