The optimum recipe of yolk powder and sodium nitrite was determined by single factortrial and preference method.
通过单因素试验和优选试验法，得出蛋黄粉和亚硝酸钠的最佳配比。
2
METHODS Indicated by the content of sennoside A, the conditions of residue solvent extraction and resin purification were determined by single factortrial.
方法番泻苷A为指标，以单因素考察确定药渣溶剂提取与树脂精制条件。
3
The trial has adopted one-factor completely random design.