CEN/TC 276/WG 1 - Methods of analysis

This European Standard specifies a procedure for the determination of the content of free fatty acid, FFA, in alkylamidopropylbetaines, which is defined as being the amount of fatty acid expressed in grams per 100 g of product.
This method has been validated for the determination of fatty acids from C6 to C20 in a total concentration range from 0,02  g to more than 3,0 g fatty acid per 100 g of product.

This European Standard specifies a method for the determination of the active matter content of alkylamidobetaines in commercial surface active agents.

This European Standard specifies a method for the determination of hydroxyl value of aliphatic and cyclic hydroxyl compounds with hydroxyl groups attached to primary and secondary carbon atoms.
This European Standard is applicable to polyacetals, temperature sensitive materials, high solids polymer polyols and rigid polyols and phenols.
This European Standard is not suitable for determination of hydroxyl groups attached to tertiary carbon atoms.
NOTE   This method is currently recommended for neutral refined products. However for products that contain an excess of acidic species a validation should be carried out to show that the acidic species either does not interfere or that the acidic species interference has been obviated.

This European Standard specifies a method for the identifying and quantifying of high boiling point solvents in finished liquid detergents and raw materials.

TC - Modification to 4.8
German translation received on 2006-06-07 NOT circulated as the corrigendum concerns the English text ONLY.

TC - Modification to 4.10

This European Standard specifies a method for the determination of the content of inorganic sulphate in anionic surface active agents. It can be applied to a-olefin sulphonates and n-olefin sulphonates, alcohol sulphates, alcohol ether sulphates, alkyl benzene sulphonates and other alkyl sulphonates. This method is used also for the determination of inorganic sulphate in alkyl benzene sulphonates or other alkyl sulphonates in their acid form. This method also applies to deep-coloured samples.
NOTE   Sulphate can be present as sulphuric acid, ionic salts of this acid or mixture of these.

This European Standard specifies a method for the determination of the content of free N-(3-dimethylaminopropyl)-alkylamides (amidoamine) in alkylamidopropylbetaines, expressed in grams per 100 g of product.
This method is applicable in the range between 0,02 g and 1,0 g of amidoamine per 100 g of product.

This European Standard specifies a method for the determination of tetraacetyl ethylene diamine (TAED) content greater than or equal to 25 g/100 g in granules.

This European standard specifies a method for the determination of the content of low boiling solvents, e. g. methanol, ethanol propan-1-ol and propan-2-ol in liquid detergents.
The method is applicable to liquid detergents containing low boiling solvents in the range from 0,5 g/100 g to 10 g/100 g.

This European Standard specifies a method for the determination of the active content and molar mass of sodium dodecyl sulphate used as original titre for the titre determination of standard solutions for surface active agents titration.
NOTE   These are used in the mixed indicator two-phase titration (e. g. ISO 2271) and in the potentiometric titration using a surface active agent sensitive electrode (e.g. EN 14480).

This European Standard specifies a method for the determination of the content of anionic surface active agents and soaps in detergents and cleansers, defined as being the amount of anionic surface active agents expressed in millimoles per 100 g of product.
NOTE 1   The applicability in products different that those tested should be checked in each particular case.
NOTE 2   In comparison to usual laboratory two-phase titration with visual endpoint determination (see ISO 2271), potentiometric titration offers the advantage of automation; operator-dependent differences in recognising the equivalence point can be neglected, and a non-critical solvent replaces the toxicologically critical chloroform.

This European Standard specifies a method for the determination of the content of quaternary ammonium surface active agents in raw materials and formulated products, defined as being the amount of quaternary ammonium surface active agents expressed in millimoles per 100 g of product.
NOTE 1   The applicability in products different than those tested should be checked in each particular case.
NOTE 2   In comparison to usual laboratory two-phase titration with visual endpoint determination (see ISO 2871-1 and ISO 2871-2) potentiometric titration offers the advantage of automation, operator-dependent differences in recognising the equivalence point can be neglected, and a non-critical solvent replaces the toxicologically critical chloroform.

This document specifies a method for the determination of the content of anionic surface active agents in raw materials, defined as being the amount of anionic surface active agents expressed in millimoles per 100 g of product.
NOTE 1   The applicability in products different than those tested should be checked in each particular case.
NOTE 2   In comparison to usual laboratory two-phase titration with visual endpoint determination (see ISO 2271) potentiometric titration offers the advantage of automation, operator-dependent differences in recognising the equivalence point can be neglected, and a non-critical solvent replaces the toxicologically critical chloroform.

This draft European Standard specifies a method for the determination of hydroxyl value of aliphatic and alicyclic hydroxyl compounds such as polyols, sorbitan esters, plasticisers and surface active agent alcohols and ethoxylates with hydroxyl values greater than 20 mg/g KOH.

A test portion is dissolved in ethanol and the solution is acidified. The alkane monosulfonic acids are separated from the alkane disulfonates and sulfate ions by extraction with light petroleum. The light petroleum phase is evaporated and the residue is solved in ethanol. Traces of alkali are removed by means of a cation-exchange column. The eluate is neutralized with carbonate-free sodium hydroxide solution. The sodium alkane monosulfonates so formed are dried and weighed. The mean relative molecular mass of the alkanemonosulfonates and the alkanemonosulfonate content are calculated.

This European Standard specifies a method for the determination of dialkyl-tetralins (DAT), being 1,4-dialkyl-2,3-dihydro-naphthalene in linear alkylbenzene (LAB) in the range of the mass fraction of 0,5 % to 10 %.

This European Standard specifies the methods for the determination of primary, secondary and tertiary amino nitrogen content in surface active agents by potentiometric titration.

This European Standard specifies a test method for the determination of the content of free ethylene oxide in the range from 1 mg/kg to 100 mg/kg in polyglycols, ethoxylates of alcohols and alkylphenols and in fatty acid polyglycol esters.

TC - Modification in 10.2

TC - Modification in 5.3 and Clause 8

This European Standard specifies a method for the determination of 0,02 mmol to 1 mmol of free amine in alkyl dimethyl betaines. Monochloroacetic acid, glycolic acid and strong acids do not interfere the determination.

This European Standard specifies a method for the determination of amide nitrogen content in surface active agents by potentiometric titration. It is not applicable to other basic substances.

This European Standard specifies a method for the determination of total base nitrogen content in surface-active agents by potentiometric titration.

This European Standard specifies a method for the determination of the contents of non-ionic substances in anionic surface active agents (sulfates, sulfonates and ethoxysulfates) by high performance liquid chromatography (HPLC).

This European Standard specifies a method for the qualitative and quantitative determination of ethylene oxide and propylene oxide groups in ethylene oxide (EO) and propylene oxide (PO) adducts, polyethers and polyglycol esters.
NOTE   If a suitable calibration is performed, methoxy groups can also be determined.

This European Standard specifies a test method for the determination of up to 1 milliequivalent of alkyldimethyl betaine. Monochloroacetic acid, glycolic acid, strong acids and amines do not intefere.

This European Standard specifies the Karl Fischer method using electrometric end point detection for the determination of the water content of surface active agents. The method is applicable to products in form of powders, pastes and solutions.

This European Standard specifies a gas-liquid chromatography (GLC)/head space method for the determination of 1,4-dioxane in alkyl-ethoxy-sulfate products. The method is applicable to samples containing 1,4-dioxane in the range from 5 mg/kg to 100 mg/kg.

This European standard specifies a method for the determination of the polyethylene glycol (PEG) content in aromatic and aliphatic non-ionic surface active agents of the type R - (O - C2H4) p OH; where p is the mean ethylene oxide (EO) value. It is applicable to all ethoxylated products soluble in methanol or methanol/water mixture. This method applies to PEG concentrations as mass fraction greater than or equal to 0,1 %.

This European Standard specifies a method for the determination of the total polyethylene glycol (PEG) content of aromatic and aliphatic non-ionic surface active agents of the type R - (O - C2H4)p - OH, where p is the mean ethylene oxide (EO) value. It applies for concentrations of PEG higher than approximately 0,1 g/100 g of the laboratory sample.