Survey of Chemical Substances in Consumer Products, 67 – Survey and release of chemical substances in "slimy" toys

Survey and release of chemical substances in "slimy" toys

5 Quantitative analyses

5.1 Headspace analysis results from quantitative determination
- 5.1.1 Headspace method description
- 5.1.2 Headspace analysis results
5.2 GC-MS Analysis (quantitative determination) migration
- 5.2.1 GC-MS Analysis method description
- 5.2.2 GC-MS Analysis results
5.3 ICP-MS Analysis (quantitative determination)
- 5.3.1 ICP-MS Analysis method description
- 5.3.2 ICP-MS Analysis results

5.1 Headspace analysis results from quantitative determination

5.1.1 Headspace method description

For selected components, a quantitative determination of the degassing from the slimy toys was carried out. It was carried out based on samples exposed at the screening analysis. The amount of detected organic components was determined according to external standards of toluene. These standards were prepared on Tenax filters in concentrations of 5 ng to 200 ng and subsequently analysed by thermal desorption combined with gas chromatography-mass spectrometry (ATD/GC-MS).

The stated concentration in mg component/m³ air is a mean value valid for the time of exposure of the Tenax filters and is calculated according to ISO/DIS 16017-2 for passive (diffusive) sampling on solid adsorbents. A sampling rate valid for toluene was used.

5.1.2 Headspace analysis results

The result of the headspace analysis is stated in Enclosure G.

5.2 GC-MS Analysis (quantitative determination) migration

5.2.1 GC-MS Analysis method description

For selected organic components, a quantitative determination of the migration from the slimy toys to artificial saliva and sweat respectively was carried out.

The amount of the selected components was determined according to external standards of the respective analyts. These standards were prepared in 20 ml artificial saliva-solution/artificial sweat-solution and subsequently extracted and analysed as the extracts of the slimy toy.

5.2.2 GC-MS Analysis results

A detailed survey is shown below in Table 5.2 and in Enclosure H. The amounts are stated in µg per g slimy toy.

For the aromatic hydrocarbons there is a good correspondence between the qualitative screening analysis and the quantitative determination, because internal standards of deuterium-marked aromatic hydrocarbons were used, which have the same recovery as the analyts.

For the rest of the components, where recovery for the analyts is expected to be different from recovery for the internal standards because of considerable chemical differences, there are great deviations between the qualitative and the quantitative determinations.

5.3 ICP-MS Analysis (quantitative determination)

5.3.1 ICP-MS Analysis method description

Quantitative determination of nickel has been carried out in the 2 selected slimy toys. The migration was carried out in artificial saliva-solution/artificial sweat-solution. Subsequently, nickel was determined directly in the extract, which was made sour by means of nitric acid (sub boiling) prior to analysis by FI-ICP-MS with internal standardization.

5.3.2 ICP-MS Analysis results

The result of the analysis is stated below in Table 5.3 and Enclosure I. The amounts are stated in µg per g slimy toy.

Table 5.3 The result of quantitative analysis of nickel

Sample mark	ID no.	Ni µg/g	% RSD
30396-9	TO-01 - Slime	0.83	4.0
30396-18	A-01 - Gel	2.96	2.5

These results agree with the results from the screening analysis - within approx. 15%.

As a starting point, these products are not expected to contain nickel; consequently, the detected content is assumed to be contaminations from the manufacture of the products, e.g. from use of nickel-containing catalysts.