Rapid determination of arsenic uptake from garlic, peanut different tissue under arsenic solution stress by Coulomb Titrimetric Method

In order to understand the rules and characteristics of arsenic uptake from garlic, peanut different tissue under arsenic solution stress, and to establish a rapid determination method of arsenic in agricultural products, microwave digestion procedure was used to process samples rapidly, As5+ was changed into As3+ in the digestion solution. According to Faraday's law of electrolysis, anode electric I3-was determined, the mass fraction of arsenic in sample was calculated according to the power consumption directly. The results showed that:the samples from surface to inside. All tissue absorbs arsenic, the average absorption of garlic was 7.363~6.281 mg/kg, the average absorption of peanut was 7.191~1.083 mg/kg. This method was reproducible, simple, fast, and suitable for rapid analysis of elements arsenic in agricultural product . Garlic powder parallel was determined 12 times and its RSD was 3.2%(n=12), the recovery rate was 98.80%~102.80%.