Chloroform is the most important product of the chlorination of water with a concentration higher than that of other trihalomethanes (THMs) produced. The presence of THMs in water causes harm to the health of the people who use that water. Herein, a simple cotton pad-based sensing device was introduced and the conditions were optimized for the detection and determination of chloroform in different water samples. Factorial design was employed for the identification of the significant factors in chloroform assays based on the proposed method. The results showed that heating and purging did not have a significant effect on the color variations of the cotton pad sensor. The detection limit and dynamic linear range for the proposed method were 0.0083 mg L⁻¹ and 0.0087–1.52 mg L⁻¹, respectively. The sensitivity of the method was lower than that of other optical and Fujiwara-based methods used in the determination of THMs. The sensitivity of a method can be related to the simultaneous trapping and preconcentration of the analyte in the designed apparatus. The method was successfully applied to the analysis of drinking and pool water samples. The method is a simple, fast and low-cost method for checking water quality in terms of the presence of THMs.

中文翻译：

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比色法检测和测定水中三卤甲烷的基于棉垫的传感器

氯仿是水氯化过程中最重要的产物，其浓度高于所生产的其他三卤甲烷（THM）的浓度。水中存在THM会对使用该水的人们的健康造成危害。在此，介绍了一种简单的基于棉垫的传感装置，并优化了用于检测和测定不同水样中氯仿的条件。基于所提出的方法，采用因子设计来确定氯仿测定中的重要因子。结果表明，加热和吹扫对棉垫传感器的颜色变化没有显着影响。该方法的检出限和动态线性范围分别为0.0083 mg L ^-1和0.0087–1.52 mg L ^-1， 分别。该方法的灵敏度低于测定THM的其他光学方法和基于藤原的方法。方法的灵敏度可能与设计设备中同时捕获和预浓缩分析物有关。该方法已成功应用于饮用水和泳池水样的分析。该方法是一种根据THM的存在来检查水质的简单，快速且低成本的方法。