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目的建立过氧化氢银离子复方消毒液中银含量的检测方法,从而快速、准确评价消毒剂中银离子的稳定性。方法采用塞曼背景校正石墨炉原子吸收法,在波长328.1 nm、灯电流7.0 mA和狭缝宽1.3 nm条件下,对某消毒液中银离子含量进行分析和评价。结果检测线性范围2.5～60 ng/ml,相关系数为0.9997,检出限0.10ng/ml,相对标准偏差2.13%,平均回收率为104%～116%。结论该方法测定消毒剂中银离子具有快速、准确、灵敏等优势,能满足这类消毒剂中银离子稳定性的评价。
Objective To establish a method for the determination of silver in the disinfectant solution of hydrogen peroxide and silver ion so as to evaluate the stability of silver ion in disinfectant rapidly and accurately. Methods The silver ion concentration in a disinfectant solution was analyzed and evaluated by Zeeman background-corrected graphite furnace atomic absorption spectrometry at a wavelength of 328.1 nm, a lamp current of 7.0 mA and a slit width of 1.3 nm. Results The linear range of detection was 2.5-60 ng / ml, the correlation coefficient was 0.9997, the detection limit was 0.10 ng / ml, the relative standard deviation was 2.13% and the average recovery was 104% -116%. Conclusion The method for the determination of silver ions in disinfectant has the advantages of fast, accurate, sensitive and can meet the stability of silver ions in such disinfectants evaluation.