PLM125 | 水质总硬度标准溶液 Total hardness standard solution

水质总硬度标准溶液是一种用于水中钙、镁总量测定的标准物质，通常以高纯碳酸钙（CaCO3）为主溶质（必要时辅以高纯氧化镁），经重量-容量法精确配制而成，主要用于生活饮用水、地下水、锅炉水等水质总硬度指标的滴定分析（如 EDTA 滴定法）中，用作工作曲线校准、方法准确度验证和实验室质量控制，其量值可经有证标准物质或 EDTA 标准滴定液核验溯源，是水质硬度检测不可或缺的量值传递载体。

基质：碳酸钙标准物 (以 CaCO3 计)

常温运输与保存，有效期12个月

A standard solution for total water hardness is a reference material used to determine the total concentration of calcium and magnesium in water. Typically prepared with high-purity calcium carbonate (CaCO3) as the primary solute, it is accurately formulated using gravimetric-volumetric methods. This solution is primarily used in titration analysis—such as EDTA titration—for measuring total hardness in drinking water, groundwater, boiler water, and other water types. It serves as a calibration standard for working curves, validation of method accuracy, and laboratory quality control. Its values can be verified and traced back through certified reference materials or standard EDTA titrant solutions, making it an essential carrier for transferring accurate hardness measurements in water quality testing.

Matrix: Calcium carbonate standard substance (as CaCO3)