Baran M
Vet Med (Praha). 1985 Dec;30(12):733-8.
In a trial with rams, application of polyethylene powder (PE) as a marker for determination of feed passage rate through the digestive tract and three methods of its determination in feed and feces were tested. PE with particle size 0.4 mm and specific weight 0.924 was administered to animals in feed and its excretion was studied during the period of 10 days in two experimental diets based on secondary sources of wood, and in one control diet. PE formed 3.9% (D-2), 3.5% (D-1) and 4% (control) of the diet dry matter and was determined by gravimetric method; for mineralizing organic matter in the sample, nitric acid (Chandler et al., 1964), mixture of sulphuric and nitric acid (Kemmink and Dijkstra, 1968) and sodium hydroxide (Boling et al., 1967) were used. The most suitable was the method using sodium hydroxide, by which 81.23% (D-2), 84.78% (D-1) and 86.6% (control) of PE recovery was determined in feces samples.
在一项针对公羊的试验中，测试了使用聚乙烯粉末（PE）作为标记物来测定饲料通过消化道的速率，以及三种在饲料和粪便中测定该标记物的方法。将粒径为0.4毫米、比重为0.924的PE添加到饲料中喂给动物，并在10天内研究其在两种以木材副产品为基础的实验日粮以及一种对照日粮中的排泄情况。PE在日粮干物质中所占比例分别为3.9%（D - 2）、3.5%（D - 1）和4%（对照），采用重量法进行测定；在样品中矿化有机物时，分别使用了硝酸（钱德勒等人，1964年）、硫酸和硝酸的混合物（凯明克和迪克斯特拉，1968年）以及氢氧化钠（博林等人，1967年）。最合适的方法是使用氢氧化钠的方法，通过该方法在粪便样品中测定的PE回收率分别为81.23%（D - 2）、84.78%（D - 1）和86.6%（对照）。
