Sjögren B, Hedström L, Ulfvarson U
Int Arch Occup Environ Health. 1983;51(4):347-54. doi: 10.1007/BF00378348.
Welding stainless steel with covered electrodes, also called manual metal arc welding, generates hexavalent airborne chromium. Chromium concentrations in air and post-shift urine samples, collected the same arbitrarily chosen working day, showed a linear relationship. Since post-shift urine samples reflect chromium concentrations of both current and previous stainless steel welding fume exposure, individual urine measurements are suggested as approximate although not exact estimators of current exposure. This study evaluates the practical importance of such measurements by means of confidence limits and tests of validity.
使用药皮焊条焊接不锈钢，也称为手工电弧焊，会产生空气中的六价铬。在任意选定的同一个工作日采集的空气和班后尿样中的铬浓度呈线性关系。由于班后尿样反映了当前和先前不锈钢焊接烟尘暴露的铬浓度，因此建议将个体尿液测量结果作为当前暴露的近似估计值，尽管并非精确估计值。本研究通过置信区间和有效性检验来评估此类测量的实际重要性。
