Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, PO Box 2871, Beijing 100085, People's Republic of China.
Talanta. 2001 Apr 12;54(2):329-32. doi: 10.1016/s0039-9140(00)00660-3.
The applicability of reagent-injection flow injection (FI) technique in elimination of background absorption was evaluated by using the FI determination of water-soluble chloride in cigarettes, based on the mercury thiocyanate method, as a model. Some parameters of the proposed reagent-injection FI method were optimized and the proposed procedure had a linear range of 0-7.5 mg l(-1) Cl, a detection limit of 0.02 mg l(-1) Cl, a sampling rate of 60 h(-1) and a relative standard deviation of 0.1% at 5 mg l(-1) Cl. Eight cigarette samples were analyzed by this proposed reagent-injection FI method and the referential membrane dialysis FI procedure. The relative errors were <4.3%, and paired t-test shows that there are no significant differences between these two methods. As no dialysis unit was needed, the reagent-injection FI method has much simpler flow system than the existed CFA and FI methods.
采用汞硫氰酸盐法，以水溶性氯化物在香烟中的 FI 测定为模型，评价了试剂注入流动注射（FI）技术在消除背景吸收方面的适用性。对所提出的试剂注入 FI 方法的一些参数进行了优化，该方法在 0-7.5mg/L Cl 范围内呈线性，检测限为 0.02mg/L Cl，采样率为 60h-1，在 5mg/L Cl 时相对标准偏差为 0.1%。用所提出的试剂注入 FI 方法和参考膜透析 FI 程序对 8 个香烟样品进行了分析。相对误差<4.3%，配对 t 检验表明这两种方法之间没有显著差异。由于不需要透析单元，因此与现有的 CFA 和 FI 方法相比，试剂注入 FI 方法的流路系统要简单得多。
