BS EN 14362-1-2012 禁用偶氮染料释放芳香胺欧盟测试方法(10)

禁用偶氮染料释放芳香胺欧盟测试方法,替代原-1&-2方法。

BS EN 14362-1:2012

EN 14362-1:2012 (E)

6.4 t-butyl methyl ether. 6.5 n-pentane.

6.6 Citrate/sodium hydroxide buffer solution, pH = 6, c = 0,06 mol/l1).

6.7

Aqueous sodium dithionite solution, ρ = 200 mg/ml2) freshly (daily) prepared.

6.8 Diatomaceous earth.

6.9 Amine substances - amines 1 to 4, 7 to 21 (as specified in Table 1), and aniline and 1,4-phenylenediamine - all of highest available defined purity standard. 6.10 Standard solutions.

6.10.1 Stock solution of amines with a concentration of equal to or greater than 300 µg of each amine per millilitre of an appropriate solvent.

NOTE

Acetonitrile is an appropriate solvent for this stock solution, resulting in good stability of amines.

6.10.2 Calibration solution of amines for daily use.

Dilute from the stock solution 6.10.1 to a concentration of ρ = 15,0 µg of each amine per millilitre of an appropriate solvent.

6.10.3 Calibration solutions of amines for quantification, concentration range from 2 µg up to 50 µg of each amine per millilitre of an appropriate solvent.

NOTE

It is the responsibility of each lab to choose appropriate concentrations for the calibration.

6.10.4 Internal standards in solution (IS), ρ = 1,0 mg of IS/ml of the appropriate IS solvent. In case of GC-MS analysis, use one of the following internal standards: IS1: benzidine-d8, CAS No.: 92890-63-6; IS2: naphthalene-d8, CAS No.: 1146-65-2; IS3: 2,4,5-trichloroaniline, CAS No.: 636-30-6; IS4: anthracene-d10, CAS No.: 1719-06-8.

NOTE If the confirmation analysis for benzidine is done with DAD or TLC the use of IS1: benzidine-d8, CAS No.: 92890-63-6 is not feasible, because the peak cannot be separated from the none deuterated benzidine.

6.11 Sodium hydroxide aqueous solution, a mass fraction of 10 %. 6.12 Grade 3 water, complying with EN ISO 3696:1995.

7 Apparatus

7.1 Extraction apparatus, according to Figure 1, consisting of:

1) c is citrate concentration. 2) ρ is the mass concentration.

8

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