以天然高分子材料壳聚糖作在线预富集柱填料,流动注射与电热原子光谱联用测定痕量Cr(VI)。采样体积5.80mL,采样频率22样/h,富集倍数51倍,线性范围0.02μg/L～0.12μg/L,该方法的检出限(3s,n=11)0.69ng/L,相对标准偏差5.1%(CCr(VI)=0.10μg/L,n=11)。将该方法用于环境水样、茶叶样品和头发样品中Cr(VI)的测定,结果满意。 Chitosan, a natural polymeric material, was used as preconcentration column packing for the determination of trace Cr (VI) by flow injection coupled with electrothermal atomic spectroscopy. The detection limit (3s, n = 11) was 0.69ng / L for the sample volume of 5.80mL, sampling frequency of 22 samples / h, enrichment factor of 51 times and linear range of 0.02μg / L to 0.12μg / Deviation 5.1% (CCr (VI) = 0.10 μg / L, n = 11). The method was applied to the determination of Cr (VI) in environmental water samples, tea samples and hair samples with satisfactory results.