[Determination of trace arsenic in soy and vinegar by catalytic oscillopolarography].
The determination of trace arsenic in soy and vinegar by oscillopolarography was investigated. A sensitive catalytic wave of arsenic appeared at -0.73V (vs. SCE) in 2mol/L H2SO4-0.2 mol/L KI-5 micrograms/ml Te systems. The linear relationship was 0-100ppb. The determination of arsenic in soy and vinegar was carried out after digestion with nitricperchloric acids. The detection limit was 1 ppb. The relative standard deviations were 4.7% and 8.8% respectively from the determinations of soy and vinegar. Recoveries were 92%-102% and 96%-110% respectively.
Sun
X
X
Lü
B
B
D001151:Arsenic / Q000032:analysis*; D005421:Flavoring Agents / Q000032:analysis*; D005506:Food Contamination / Q000032:analysis*; D011048:Polarography / Q000379:methods
D005421:Flavoring Agents; D001151:Arsenic