含多个零售商的供应商最低免运费订单批量模型

在一个供应商和多个零售商的供应链中,本文从供应商角度针对最小免运费订货策略建立了优化模型,并通过理论分析给出了求解方法及免运费策略的适用条件.最后,通过算例对最优免费送货策略的有效性进行了验证.     

光电直读光谱仪分析HSI-S铝合金中主量元素

用 FSQ非真空型光电直读光谱仪分析日本牌号“HSI- S”铝合金中主量元素 ,优化了标准样品的选择、试样的制备、元素分析谱线的选择、仪器工作参数设定等实验条件。在无此牌号合金的光谱标样的情况下 ,采用国产标样 ,实现了 HSI- S铝合金中主量元素的分析。方法的准确度和精密度符合国家标准 ,降低了分析成本 ,适合生产企业使用     

Applications of Spectrometric Full Spectrum Quantitation (FSQ) Software for Multicomponent Analysis and Stability Studies of Pharmaceuticals

ABSTRACT

A rapid, simple, accurate and specific spectrophotometric procedure for analysis of multi-component mixtures and for assessment of drug stability in pharmaceutical products has been described. The proposed method relies on the application of the spectrophotometric full spectrum quantification (FSQ) software to overcome severe spectral overlap and to permit measurement of the individual components in mixtures with satisfactory degree of accuracy and precision. The potential of FSQ software for multicomponent analysis was elucidated by analyzing complex mixtures of highly overlapping spectra (aspirin/caffeine/salicylic acid) and mixtures of structurally similar compounds (cephalexin/ cephradine) and (ceftriaxone/ ceftazidime /cefotaxime). Furthermore, the robustness of the FSQ for stability studies was assessed by analyzing chloramphenicol in presence of its alkali-induced degradation products and famotidine in presence of its acid-induced degradation products. The validity of FSQ software for multicomponent analysis and stability studies was evaluated by comparing the results with those of HPLC methods. Statistical analysis indicated that the FSQ and HPLC data were consistent, however the FSQ method is faster, easier and more reliable.