(1) simple aqueous standards are used instead of solid-sample ; (2) the sample concentration can easily be changed by dilution, it can avoid weighted errors and inhomogeneity problems are eliminated, and the analyte concentration falls within the linear range; (3) slurry can be directly sampled using the conventional autosampler of GFAAS, thus avoiding the need for specialized expensive equipment such as a microbalance, and solid sampling accessories.