Pulliainen T K, Wallin H C
VTT Biotechnology and Food Research, Finland.
J AOAC Int. 1994 Nov-Dec;77(6):1557-61.
A spectrophotometric method in which the sample is dry-ashed in the presence of zinc oxide, and total phosphorus content is measured colorimetrically as molybdenum blue was evaluated by 12 participating laboratories from the Nordic countries. The study included potato flour, sausage, cold ham, infant formula powder, cheese, and skimmed milk powder. The materials were presented to the participants as 12 randomly coded samples of 2 blind duplicates of each material. The phosphorus content of the materials varied between 0.076 and 0.96 g/100 g. The relative standard deviation for repeatability of the method varied from 1.1% for 0.96 g phosphorus/100 g to 5.4% for 0.29 g phosphorus/100 g. The relative standard deviation for reproducibility varied from 3.6% for 0.96 g phosphorus/100 g to 7.7% for 0.23 g phosphorus/100 g.
一种分光光度法，该方法是在氧化锌存在的情况下将样品进行干灰化处理，然后以钼蓝比色法测定总磷含量，来自北欧国家的12个参与实验室对其进行了评估。研究材料包括马铃薯粉、香肠、冷火腿、婴儿配方奶粉、奶酪和脱脂奶粉。这些材料以每种材料2个盲样复制品的12个随机编码样品的形式提供给参与者。材料中的磷含量在0.076至0.96克/100克之间变化。该方法重复性的相对标准偏差从磷含量为0.96克/100克时的1.1%到磷含量为0.29克/100克时的5.4%不等。再现性的相对标准偏差从磷含量为0.96克/100克时的3.6%到磷含量为0.23克/100克时的7.7%不等。
