Analysing for 4,4′-diaminodiphenylmethane in heritage collections containing solid and medium density flexible linear polyester polyurethanes using liquid chromatography/mass spectrometry

Tillotson, Robert; Crumplin, Timothy E.; Jones, Graham J.; Marshall, George; Dawson, Joe

doi:10.1186/s40494-019-0290-x

Heritage Science

Table 1 Normal and spiked LCMS results obtained from naturally hydrolysed polyurethane shoe soles stored for up to 50 years

From: Analysing for 4,4′-diaminodiphenylmethane in heritage collections containing solid and medium density flexible linear polyester polyurethanes using liquid chromatography/mass spectrometry

Sample number	Approx. date of manufacture	AGT Sample identification code	PUR sample construction	PUR sample colour	Normal LCMS solution results		Spiked LCMS solution results
Sample number	Approx. date of manufacture	AGT Sample identification code	PUR sample construction	PUR sample colour	Chromatogram peak area	ppm in PUR sample	Chromatogram peak area	ppm in PUR sample
1	1970	M19+SD118	Single density	Black	0	0	256,000	4.8
2	1974	1234/2926	Single density	Dark brown	0	0	217,000	3.9
3	1972	M19+SD100	Single density	Tan	0	0	200,000	3.6
4	1970	M19+SD122	Single density.	Black	0	0	162,000	2.9
5	1971	1234/1918A	Single density	Black	0	0	201,000	3.7
6	1970	1974/770	Single density	Black	0	0	206,000	3.8
7	1977	1234/3115	Single density solid elastomer	Tan-orange	0	0	211,000	3.9
8	1970	M19+SD123	Single density	Black	0	0	203,000	3.8
9	1975	1234/2934	Single density	Beige-mid-brown	0	0	169,000	3.1
10	1975	1234/2933	Single density	Mid-brown	0	0	183,000	3.4
11	1974	1234/2889	Single density	Black	0	0	194,000	3.5
12	1973	1234/2864	Single density	Tan-orange	0	0	181,000	3.3
13	1975	W19/SD865	Single density	Beige-mid-brown	0	0	197,000	3.6
14	1973	1234/2865B	Single density	Mid-brown	0	0	190,000	3.5
15	1981	M19/SD339	Dual density Outsole	Tan- orange	0	0	105,000	2.6
16	1981	M19/SD339	Dual density. Mid-sole	Black	0	0	119,000	3.1
17	1989	C19+SD614	Dual density. Midsole	Off-white	10,200	0.3	98,700	2.5
18	1985	C19+SD458LA	Single density	Light grey	0	0	119,000	3.0
19	1997	Sundapple	Single density	White	0	0	102,000	2.6
20	1996	0161	Dual density. Outsole	Black	11,800	0.3	189,000	4.5
21	1996	0161	Dual density. Midsole	Grey	0	0	138,000	3.5
22	1982	W19+SD132	Single density	Tan	0	0	135,000	3.4
23	1980–1999	SHO/5/23/3	Single density	Cream	0	0.00	778,000	2.7
24	1980–1999	SHO/5/8/1	Single density	Cream	0	0.00	776,000	2.7
25	1980–1999	CR/361/17	Single density	Brown	24,700	0.02	342,000	1.2
26	1980–1999	SHO/5/37/1	Single density	Cream	27,800	0.02	419,000	1.4
27	1980–1999	SHO/5/5/2	Single density	Cream	0	0.00	768,000	2.7
28	1980–1999	SHO/5/155	Single density	Cream-brown	23,100	0.02	333,000	1.1
29	1982	W19/SD1322	Single density. High blow (hydrolysed 4 weeks)	Tan	0	0.00	149,000	3.0
30	1982	W19/SD1322	Single density. High blow (hydrolysed 8 weeks)	Tan	0	0.00	757,000	2.6

All samples were coloured by pigments or dyestuffs and showed appreciable physical degradation. Results for accelerated hydrolysis tests are shown in Sample numbers 29 and 30

Back to article page