Phenol, o-cresol, m-cresol, p-cresol, cresylic acid and xylenols for industrial use — Methods of tes...
Gives also the procedure to be used for the determination of water content by the Karl Fischer method. This method is applicable only to liquefied phenol and m-cresol. The determination of density at 20 °C is applicable only to liquefied phenol, m-cresol, cresylic acid and xylenols.
Phenol, o-cresol, m-cresol, p-cresol, cresylic acid and xylenols for industrial use — Methods of tes...
The principle of the method is based on distillation of a test portion in the presence of an appropriate solvent, in a Dean and Stark apparatus. Determination of the volume of condensate collected in the receiver tube, brought to ambient temperature, assuming this liquid to be water. An appropriate solvent is xylene, solvent naphtha or alternatively, toluene. ISO 1897-2 replaces ISO/R 1898-1971.
Phenol, o-cresol, m-cresol, p-cresol, cresylic acid and xylenols for industrial use — Methods of tes...
Specifies a volumetric method, after distillation, for determining of neutral oils, and a titrimetric method, after distillation, for determining of pyridine bases. The principle is based on distillation from an aqueous alkaline solution of a test portion. Measurement of the volume of neutral oils collected. Titration of the bases present in the aqueous distillate and in the oils with standard…
Phenol, o-cresol, m-cresol, p-cresol, cresylic acid and xylenols for industrial use — Methods of tes...
Simple empirical test of no great precision. The principle consists in shaking a test portion with sodium hydroxide solution under specified conditions and assessment of any insoluble matter present in suspension in the mixture by comparison either with an agreed standard turbidimetric solution or with sodium hydroxide solution. The comparison of the turbidity of the two solutions is carried out…
Phenol, o-cresol, m-cresol, p-cresol, cresylic acid and xylenols for industrial use — Methods of tes...
Simple empirical test of no great precision. The principle consists in shaking a test portion with sodium hydroxide solution under specified conditions and assessment of any insoluble matter present in suspension in the mixture by comparison either with an agreed standard turbidimetric solution or with water. The comparison of the turbidity of the two solutions is carried out by viewing…
Phenol, o-cresol, m-cresol, p-cresol, cresylic acid and xylenols for industrial use — Methods of tes...
simple test which cannot be used to obtain quantitative results. The principle of the method is based on formation of a brown colour on lead acetate paper due to reaction with any hydrogen sulphide present in a test portion. ISO 1897/6 replaces ISO Recommendation R 1908-1971.