Environmental pollution and its consequences are of global concern. There is an urgent need of development of simple, low-cost detection or diagnostic point of care devices to detect, analyze and determine the pollutants in various environmental, food and biological samples. Such development will be critically important for improvisation of human health and quality of life. Toxic heavy metals potential contaminates and has lethal effects on deterioration of environment and thereby on human health. Paper based analytical sensors are an efficient diagnostic point-of-care devices being cheap, robust, user friendly and environmental-friendly. We have proposed a paper-based sensor for detection and quantitative determination of Lead by immobilization of potassium iodide and ninhydrin over paper platform. A bright yellow colour of varying intensity develops on coming in contact with samples contaminated with lead. The coloured area is then scanned and images are transferred to image processing tool of MATLAB software to read their RGB values. The effective intensities are then calculated mathematically. The developed sensor determines the contamination of lead up to 0.01 ppm. Thus, the proposed paper based analytical sensor is potential diagnostic point –of-care device.

中文翻译：

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一种改进的简单，耐用，便宜和潜在的铅（II）诊断设备

环境污染及其后果是全球关注的问题。迫切需要开发一种简单，低成本的检测或诊断护理设备，以检测，分析和确定各种环境，食品和生物样品中的污染物。这样的发展对于即兴人类健康和生活质量至关重要。有毒的重金属潜在物污染并致命地影响环境恶化，进而危害人类健康。纸质分析传感器是一种高效，廉价，坚固，用户友好和环保的诊断即时点设备。我们提出了一种纸基传感器，用于通过在纸平台上固定碘化钾和茚三酮来检测和定量测定铅。与铅污染的样品接触时，会形成强度变化的亮黄色。然后扫描彩色区域，并将图像传输到MATLAB软件的图像处理工具以读取其RGB值。然后通过数学计算有效强度。先进的传感器可确定高达0.01 ppm的铅污染。因此，所提出的基于纸张的分析传感器是潜在的诊断护理点设备。