Determination of total arsenic, total inorganic arsenic and inorganic arsenic species in rice and rice flour by electrothermal atomic absorption spectrometry

摘要: Abstract The determination of inorganic arsenic species in food has become very important during the last few years, since As(III) and As(V) are considered carcinogenic found at high concentrations products, such as rice. present work describes development three different methods for total arsenic, As(III)–As(V) rice flour purchased from local market by electrothermal atomic absorption spectrometry (ETAAS). were based on use selective extraction procedures optimization all crucial instrumental methodological parameters. By these new preparation species, loss transformation analytes digestion steps was prevented. For validation each method, precision, accuracy, selectivity have been assessed, performance criteria. All developed accurate precise. calculated recoveries ranged between 92% 105% (%) relative standard deviation values, under repeatability or reproducibility conditions, lower than 15% concentration levels tested. validated applied successfully a proficiency test organized International Measurement Evaluation Program (IMEP-107). also samples Greek obtained results indicated that almost detected ng/g levels.