Scaglia B, Erriquens F G, Gigliotti G, Taccari M, Ciani M, Genevini P L, Adani F
Dipartimento di Produzione Vegetale, Università degli Studi di Milano, Via Celoria, 20133 Milano, Italy.
Bioresour Technol. 2007 Feb;98(3):706-13. doi: 10.1016/j.biortech.2006.01.021. Epub 2006 Mar 15.
This work represents the first attempt to evaluate the precision of the specific oxygen uptake rate method expressed in terms of repeatability (r) and reproducibility limits (R). Three laboratories were involved in an inter-laboratory test for the validation of respiration analyses on six biomass samples (three composts and three biostabilized products) having different degrees of biological stability. Both the maximum specific oxygen uptake rate peak (SOUR) and the cumulative oxygen demand after 12 h (OD(12)) and 20 h (OD(20)) of respiration test were investigated. Precisions expressed as the relative standard deviation were in the range of 9-41%. Linear regressions found for r and R, versus OD(12) and OD(20), enabled derivation of precision values (r and R) for all respirometric levels within the operating range. The OD(12) and OD(20) indices were found to be more adequate to indicate biological stability since they were less influenced by random errors than the SOUR index.
这项工作首次尝试评估以重复性（r）和再现性限（R）表示的特定氧摄取率方法的精密度。三个实验室参与了一项实验室间测试，以验证对六个具有不同生物稳定性程度的生物质样品（三种堆肥和三种生物稳定产品）进行呼吸分析的结果。研究了呼吸测试12小时（OD(12)）和20小时（OD(20)）后的最大特定氧摄取率峰值（SOUR）以及累积需氧量。以相对标准偏差表示的精密度范围为9-41%。针对r和R与OD(12)和OD(20)的线性回归，使得能够得出操作范围内所有呼吸测量水平的精密度值（r和R）。发现OD(12)和OD(20)指数更适合指示生物稳定性，因为它们比SOUR指数受随机误差的影响更小。
