测量残余臭氧（O3）的标准方法基于靛蓝三磺酸盐在600 nm处的脱色，灵敏度系数为0.42 L mg-1cm-1（e~20000 M-1cm-1）。靛蓝源的灵敏度系数是在耗时且劳动密集的O3校准后计算的。相比之下，本文中提供的数据表明，可以使用简单的初始吸光度测量来计算靛蓝灵敏度系数，从而在进行常规测量时无需进行O3校准。七种靛蓝源的摩尔吸收率范围为15800至20355 M-1cm-1。这些结果表明，当使用未经验证的靛蓝储备溶液测量O3时，靛蓝纯度（和稳定性）可能是测量误差的一个重要来源。 作者描述了靛蓝溶液分解，并提供了验证O3灵敏度系数的简单初始吸光度方法。包括8个参考文献、表格和图表。

The standard method for measuring residual ozone (O3) is based on the decolorization of indigotrisulfonate at 600 nm using a sensitivity coefficient of 0.42 L mg-1cm-1 (e ~ 20,000 M-1cm-1). The sensitivity coefficient for a source of indigo is calculated following a time-consuming and labor-intensive O3 calibration. In contrast, the data presented in this article show that a simple initial absorbance measurement can be used to calculate the indigo sensitivity coefficient, thereby eliminating the need for O3 calibration when routine measurements are made. The molar absorptivity for seven sources of indigo ranged from 15,800 to 20,355 M-1cm-1. These results indicate that indigo purity (and stability) is potentially a significant source of measurement error when unvalidated indigo stock solutions are used to measure O3. The authors describe indigo solution decomposition and offer a simple initial absorbance method for validating the O3 sensitivity coefficient. Includes 8 references, tables, figure.