生产企业生活饮用水总硬度监测数据

用于测定企业自来水生活饮用水总硬度检测。通过对企业自来水生活饮用水采样点采样，依据自来水生活饮用水感官性状和物理指标中总硬度的测定方法，即乙二胺二乙酸二钠滴定法，测定其总硬度是否符合国家标准，为确保企业职工职业健康和为卫生监管部门靶向监管提供技术支撑。通过对嘉善各企业自来水采样点位采样的生活饮用水的检测，依据生活饮用水感官性状和物理指标中总硬度的测定乙二胺二乙酸二钠滴定法（GB/T5750.4-2023.7.1），根据乙二胺二乙酸二钠（EDTA）标准溶液的浓度C（mol/L）数值，再记录水样测定所消耗的乙二胺二乙酸二钠（EDTA）的体积V1（mL）减去空白所消耗的乙二胺二乙酸二钠（EDTA）标准溶液的体积V0（mL）的数值，再乘以100.09的摩尔质量，除以取样采集到的水样体积V（mL），得到的总数据再乘以样品稀释倍数f，最终结果换算成碳酸钙计算，得出生活饮用水中总硬度的数值。公式如下：总硬度ρ（CaCO3)=【C×（V1-V0）×100.09×1000×f】/V。通过生活饮用水卫生评判标准GB 5749-2022，得出最后结论判断，生活饮用水总硬度检测的限值为450mg/L，超过450mg/L的标准值（＞450mg/L）说明生活饮用水不合格。This dataset is designed for measuring the total hardness of domestic tap water in enterprises. Samples are collected from tap water sampling points in various enterprises, and the total hardness is tested via the disodium ethylenediaminetetraacetate (EDTA) titration method specified in the sensory properties and physical indicators section for total hardness determination of domestic drinking water, to verify compliance with national standards. This provides technical support for safeguarding the occupational health of enterprise employees and enabling targeted supervision by health regulatory authorities. For domestic drinking water samples collected from tap water sampling points in enterprises across Jiashan, the EDTA titration method stipulated in GB/T 5750.4-2023.7.1 for total hardness detection in sensory properties and physical indicators of domestic drinking water is employed. The calculation steps are as follows: first, record the concentration C (mol/L) of the EDTA standard solution, the volume V1 (mL) of EDTA consumed during sample testing, and the volume V0 (mL) of EDTA standard solution consumed in the blank test. Calculate the difference (V1 - V0), multiply it by the molar mass of calcium carbonate (100.09 g/mol), divide by the collected sample volume V (mL), multiply by the sample dilution factor f, and convert the final result to calcium carbonate equivalents to obtain the total hardness value of the domestic drinking water. The calculation formula is: ρ(CaCO₃) = [C × (V1 - V0) × 100.09 × 1000 × f] / V. Based on the sanitary assessment standard for domestic drinking water GB 5749-2022, the allowable limit for total hardness in domestic drinking water is 450 mg/L. If the measured total hardness exceeds 450 mg/L (>450 mg/L), the domestic drinking water is deemed unqualified.

搜集汇总

数据集介绍

特点

该数据集包含101条生产企业生活饮用水总硬度的监测数据，用于测定企业自来水生活饮用水总硬度是否符合国家标准。数据通过乙二胺二乙酸二钠滴定法测定，应用场景包括企业职工职业健康保障和卫生监管部门靶向监管。