Cystine quantification on hair treated and exposed to solar radiation.

Table 2: Cystine quantification on hair treated and exposed to solar radiation.

Treatment	Amount of cystine (%)^†
F1	5.2 (± 0.11)
F2	< 0.7
F3	< 0.7
F4	< 0.7
F5	< 0.7
F6	18.9 (± 4.55)
F7	28.7 (± 7.23)
Positive Control	< 0.7
Negative Control	< 0.7

Results expressed as mean ± standard deviation; Positive Control: Treatment sample with 20% w/w aqueous sodium lauryl sulfate solution; Negative Control: Hair sample without danger type of treatment;

^†0.7% corresponds to the limit of quantification of cystine in the analytical solution corrected for dilutions made of the hair.