Research Article
Determination of Very Low Level of Free Formaldehyde in Liquid Detergents and Cosmetic Products Using Photoluminescence Method
Table 4
Recoveries of formaldehyde in raw material and cosmetic product samples.
| | Sample tested | Added formaldehyde
mg·kg−1 | Found formaldehyde
mg·kg−1 | Recovery factor (%) | RSD
% |
| | Surfactant | 50.0 | 48.0 | 96.0 | 4.5 | | Hair shampoo | 50.0 | 51.9 | 103.8 | 2.6 | | Body shampoo | 50.0 | 47.7 | 95.4 | 3.4 | | Hand cleaner | 50.0 | 45.9 | 91.8 | 2.4 |
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All values are means ().
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