DART Application: Direct analysis of stains on cloth caused by cosmetic
MSTips No.D023 Application Note for DART
Helium was used as the DART gas. The DART gas heater was set to 200 °C. A small piece of cloth on which foundation was deposited was presented to the DART ion source.
Ions at m/z 371 were observed from the foundation of all 3 manufacturers. Based on the measured accurate masses, the elemental formula of the ions was elucidated to be C10H31O5Si5 and inferred to be the [M+H]+ ions of decamethylcyclopentasiloxane. Ions at m/z 223 were found only from Bland A and their elemental composition was elucidated to be C10H15O2Si2 from the measured accurate m/z.
By using DART ion source, the nature and cause of stains on cloth can be determined without sample preparation.
Fig. 1 A foundation stain on a piece of cloth.
Fig. 2 Mass spectra of foundation stains (Top: Bland A, Middle: Bland B, Bottom: Bland C)
|Measured m/z||Calculated m/z||Error (x 10-3)||Elemental composition||Unsaturation|
Table 1 Elucidated elemental compositions of the ions found in the mass spectrum of Bland A.
- Please see the PDF file for the additional information.
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