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Development of an analysis method to determine peroxides in or released from tooth-whitening/dental-bleaching products.

Data from titrations and catalase bioassay

Product Active ingredient Content accordingto manufacturer
%		 Titration
KMnO4
%		 Standard
deviation		 Titration
Na2S2O3
%		 Standard
deviation		 Catalase-assay
%		 Standard
deviation		 n
A UP 10 10,49 0,260 12,884 2,028 9,665 0,146 27
B UP 22 20,29 0,098 20,998 1,9934 20,682 0,561 21
C UP 16 15,45 0,096 14,657 2,157 15,362 0,485 19
D UP Not stated 11,65 0,099 22,804 5,419 10,405 0,157 17
F – 1st analysis BP Not stated nd       0,037 0,001 14
F – 2nd analysis BP Not stated 1,90 0,003     2,041 0,019 3
E – 1st analysis BP Not stated nd       -    
E – 2nd analysis BP Not stated 2,84 0,071     2,957 0,064 15
G BP 6 5,40 0,054     4,875 0,127 17
Urea peroxide, pure UP ca. 97 95,83 0,396 99,173 0,3238 97,470 0,895 12
Hydrogen peroxide, pure BP ca. 30 34,39 0,211     33,579 0,657 14

 

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Version 1.0 Marts 2009, © Danish Environmental Protection Agency