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Determination of Sulfite in Hair Waving Products Using Oxygen‐Incorporated Gold‐Modified Screen‐Printed Electrodes
Author(s) -
Chen PeiYen,
Huang ChienChang,
Chen MeiChin,
Hsu JawCherng,
Shih Ying
Publication year - 2012
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201200126
Subject(s) - sulfite , detection limit , chemistry , electrode , flow injection analysis , electrochemistry , oxygen , analytical chemistry (journal) , iodometry , linear range , nuclear chemistry , inorganic chemistry , chromatography , organic chemistry
An electrodeposition oxygen‐incorporated gold‐modified screen‐printed carbon electrode (AuOSPE) was fabricated to determine the sulfite content in hair waving products. The AuOSPE showed an electrocatalytic current for sulfite at +0.4 V (vs. Ag/AgCl). Compared with a gold screen‐printed electrode (AuSPE), the AuOSPE showed a higher electrocatalytic current. The increase in the electrocatalytic current was ascribed to the increase of the oxygen incorporated with gold atom on AuOSPE. The AuOSPE coupled with a flow injection analysis (FIA) system showed excellent oxidation current for sulfite in a 0.1 mol L −1 phosphate buffer solution (PBS), pH 6.0. The linear working range for determining the sulfite content was 0.05 to 1200 mg L −1 (0.625 µmol L −1 to 15.00 mmol L −1 ) with a calculated detection limit of 0.03 mg L −1 (0.375 µmol L −1 ) ( DL , S/N =3). Relative standard deviations ( RSD ) of 3.03 %, 2.30 % and 4.26 % were calculated for consecutive injections ( n =12) of 20, 300 and 900 mg L −1 sulfite, respectively. The amount of sulfite in two hair waving products was determined by the proposed method and a standard iodometric method. The recoveries ranged from 96.18 % to 105.61 %. The AuOSPE showed high sensitivity, selectivity, stability and reproducibility for sulfite.