Cosmetics Legislation: Methods of analysis
Office for Official Publications of the European Communities, 2000 - Consumer protection - 187 pages
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4-hydroxybenzoate absorbance accordance accurately acetate acid solution allow ammonia analysis analytical purity APPARATUS approximately aqueous barium bath benzyl Calculate calibration curve carbon tetrachloride carried centrifuge chloride chloroform chromatography colour column Commission concentration containing cosmetic products DEFINITION described detector developing difference dilute Directive dissolve distilled equipment equivalent ethanol ethyl exceed expressed extract FIELD OF APPLICATION filter formaldehyde Gas chromatograph glass grams hydrochloric acid hydroquinone hydroxide identification and determination indicator Inject internal standard laboratory liquid mark mass Measure Member method millilitres minutes mixture necessary obtained parallel peak peak area percentage by mass phase pipette Place plate portion potassium precipitate prepared present preservatives PRINCIPLE PROCEDURE quantity ratio reagents reference solutions Remove REPEATABILITY sample solution SCOPE AND FIELD separation shake silver sodium solvent standard solution suitable tank temperature titration transfer tube volume volumetric flask Weigh