Calciumgehaltswert

Calciumgehaltswert is a term used in analytical chemistry, nutrition science and related fields to denote the amount of calcium contained in a sample. It represents the calcium content or concentration and is usually reported in units such as mg/kg, g/kg, percentage by mass, or mg/L, depending on the matrix and the analytical method.

In the context of food and nutrition labeling, the calciumgehaltswert indicates how much calcium a product provides per unit, commonly per 100 g or per serving, and is used to assess dietary intake against recommended values. In soil science and agronomy, it may refer to total calcium content or exchangeable calcium, which affects soil fertility and plant availability of calcium.

Typical measurement methods include atomic absorption spectroscopy (AAS), inductively coupled plasma optical emission spectrometry (ICP-OES), inductively coupled plasma mass spectrometry (ICP-MS), and X-ray fluorescence (XRF). Sample preparation can involve digestion, fusion, or direct analysis, depending on the matrix and method. The choice of method determines the reporting unit and the limit of detection.

Interpreting the calciumgehaltswert requires attention to matrix effects, homogeneity, and calibration with appropriate standards. Laboratories report the value together with the method used, the uncertainty, and any relevant notes in certificates of analysis or product data sheets.