【摘要】 将悬浮液进样技术应用于火焰原子吸收光谱法，成功地测定了面粉中的钙、镁。将面粉悬浮于含有邻苯二甲酸二丁酯的琼脂胶体中而制成悬浮液。对悬浮剂的选择及化学干扰的消除进行了考查。将试液喷入空气－乙炔火焰，用标准加入法测定，测定结果与灰化法一致。ｔ检验表明，两种样品前处理方法之间无显著性差异，可以用悬浮液进样法取代灰化法处理样品。方法简便、快速、准确更多还原

【Abstract】 Suspension sampling technique was applied to flame atomic absorption spectrometry and was successfully used to determine calcium and magnesium in wheat flour.The wheat flour was suspended in agar sol containing dibutyl phthalate and made into suspension.Choice of suspension agent and elimination of chemical interference were studied.The test solution was injected into air acetylene flame to determine calcium and magnesium by standard addition method.Determination results were consistent with those obtained by ashing method.The t test showed that no difference was found between the two methods.Displacement of ashing method by suspension sampling method for the sample pretreatment is possible.This method is convenient,rapid and accurate.更多还原