火焰原子吸收光谱法测定采血管中柠檬酸钠的含量

Content Determination of Sodium Citrate in Tubes for Blood Specimen Collection by Flame Atomic Absorption Spectrometry

目的：建立采血管中添加剂柠檬酸钠含量的测定方法。方法采用火焰原子吸收光谱法测定采血管中添加剂柠檬酸钠的含量。结果钠元素浓度在（0～1．0）μg· mL －1范围内与对应的吸光度具有良好的线性关系，r＝0．9995，平均回收率为99．2％（n＝6），RSD＝1．9％。结论本方法操作简便快速，结果准确可靠，重复性好，可用于采血管中添加剂柠檬酸钠的含量测定。

OBJECTIVE To establish a method for content determination of sodium citrate in tubes for blood specimen collection.METHODS The additive of sodium citrate in tubes for blood specimen collection was meas-ured by flame atomic absorption spectrometry .RESULTS There was a good linear relation between the concentra-tion of Na and corresponding absorbance in （0~1.0）μg· mL-1,while the correlation coefficient was 0.9995,and the average recovery rate was 99.2%（ n=6 ） ,RSD=1.9%.CONCLUSION Accurate and repeatable result can be achieved by simple and rapid procedures .The proposed method can be applied to measure the content of additive of sodium citrate in tubes for blood specimen collection .