commiss recommend februari quantit method analysi identif acryl modacryl fibr chlorofibr trivinyl fibr eec commiss european commun regard treati establish european econom commun indent articl thereof annex council direct eec juli approxim law member state relat textil name amend direct eec requir mandatori label textil product set fibr name descript fibr make product name label conform descript annex specifi fibr refer item chain specif percentag monom pattern criterion allow identifi case distinguish verif conform textil product composit state label prove check percentag order identifi abovement fibr purpos analyt laboratori suitabl method quantit determin nitrogen chlorin make monom pattern chemic fibr current state art determin quantiti nitrogen chlorin inher exclus abovement monom pattern quantiti determin product includ proport substanc due presenc fibr matter colour agent addit nitrogen chlorin circumst lai bind method analysi expedi order ensur uniform result check conform textil product carri commun provid laboratori method quantit determin nitrogen chlorin precis due regard current state art laboratori method drawn basi numer interlaboratori test carri auspic commiss recommend accord view express committe direct relat textil name label formul recommend articl recommend laboratori conduct verif conform composit textil product identif fibr refer item annex direct eec method quantit analysi annex recommend articl member state inform commiss measur basi recommend articl recommend address member state brussel februari commiss grigori varfi member commiss oj oj annex recommend quantit analysi method identif acryl modacryl fibr chlorofibr trivinyl fibr note method make verifi permit percentag monom pattern acryl modacryl fibr chlorofibr trivinyl fibr item annex direct eec method consid mean verifi conform fibr descript doubt aris result obtain method check suitabl techniqu result limit relev fibr method quantit determin nitrogen identif acryl modacryl fibr refer item annex direct eec field applic method remov fibrou matter qualit determin acryl modacryl fibr pure state separ mixtur method appli addit nitrogen substanc complet remov dye consid addit derog council direct eec analysi binari mixtur principl nitrogen content determin percentag mass acrylonitril unit present fibr calcul mean convers factor apparatu reagent apparatu kjeldahl digest flask ml capac ii kjeldahl distil apparatu iii titrat apparatu allow precis ml reagent reagent analyt grade water distil anhydr potassium sulphat ii copper sulphat cuso iii concentr sulphur acid iv sulphur acid standard solut sodium hydroxid solut dissolv gram sodium hydroxid ml water bring volum litr water vi sodium hydroxid solut standard solut viii phenolphthalein solut indic procedur sampl dry weigh pretreat follow instruct section gener inform method quantit chemic analysi textil fibr mixtur direct eec transfer aproxim dry sampl accur weigh kjeldahl flask add gram potassium sulphat gram copper sulphat ml concentr sulphur acid densiti gentli swirl content flask fibr wet acid fix flask inclin posit suction hood reheat slowli carefulli bunsen burner heat apparatu fibr destroi increas heat order solut simmer approxim minut solut colourless flask cool carefulli dilut content ml water pour ml sulphur acid solut ml conic flask beneath condens outlet deliveri tube level liquid connect kjeldahl flask distil apparatu add ml sodium hydroxid solut slowli carefulli heat simmer collect ml distil recov entir quantiti ammonia distil lower conic flask condens approxim mm level liquid distil minut wash tube distil water collect wash liquid concial flask titrat distil standard sodium hydroxid solut phenolphthalein solut indic calcul express result percentag nitrogen sampl dry calcul percentag nitrogen dry pure sampl volum millilitr sulphur acid solut normal sulphur acid solut volum millilitr sodium hydroxid solut normal sodium hydroxid solut mass gram pretreat dri test specimen calcul acrylonitril monom unit decim place formula acrylonitril unit precis method confid limit result obtain method greater confid level method quantit determin chlorin identif chlorofibr trivinyl fibr refer item annex direct eec field applic method remov fibrou matter identif chlorofibr trivinyl fibr pure state separ mixtur method applic addit chlorat complet remov dye consid addit derog direct eec analysi binari mixtur principl combust sampl oxygen atmospher chlorin content determin percentag mass vinyl vinyliden chlorid calcul mean convers factor apparatu reagent apparatu approxim ml open neck combust flask borosil glass similar materi fit ground borosil glass stopper platinum wire mm diamet mm length weld figur flask stopper fit devic ensur stopper place prevent loss ga combust ii devic remot ignit materi infrar recommend iii filter paper low chlorin ash content reagent reagent analyt grade water distil potassium hydroxid standard solut ii hydrogen peroxid iii oxygen cylind iv perchlor acid diphenyl carbazon alcohol solut vi mercuri ii perchlor solut standard primari standard sodium chlorid solut prepar dispers mean shake gram mercuri oxid yellow ml water ad ml perchlor acid brought volum ml stadard sodium chlorid solut titr procedur sampl preliminari treatment dry weigh follow instruct section gener inform method quantit chemic analysi textil fibr mixtur direct eec weigh accur dry sampl mg place filter paper fold line trace figur roll bottom top wrap platinum wire attach stopper tightli round paper packag sampl ignit touchpap protrud freeli pour flask ml water ml potassium hydroxid solut drop hydrogen peroxid fill flask oxygen second full light touch paper stopper flask immedi secur stopper cool shake flask vigor time period minut acceler absorpt combust product fill neck flask millilitr distil water remov stopper wash platinum wire wall flask ml water boil alkalin solut minut bring solut ph perchlor acid add ml diphenyl carbazon indic titrat mercuri perchlor solut colour colourless lilac carri control titrat quantiti reagent filter paper test titrat mercuri ii perchlor chromat indic potentiometr titrat silver electrod silver nitrat solut titr emploi calcul express result percentag chlorin fibr question dry calcul cl ab cl chlorin content dry pure sampl millilitr mercuri perchlor solut consum titrat sampl millilitr mercuri perchlor solut consum titrat control test normal mercuri perchlor solut mass milligram pretreat dri test specimen percentag vinyl vinidylen chlorid monom approxim decim place calcul formula vinyl chlorid percentag cl vinyliden chlorid percentag cl precis method confid limit result chlorin percentag obtain method greater confid level precaut combust flask residu fume organ solvent care oper manual avoid oper accid caus flask explos sampl enclos flask flask properli close stage combust produc high pressur oj