纳氏试剂比色法测定水中氨氮时,常见的干扰物质有嘴些?
参考答案:
有脂肪胺、芳香胺、醛类、丙酮、醇类和有机氮胺等有机化合物,以及铁、猛、硫等无机离子、色度、浊度也干扰测定。
his play, , is very wonderful: there are many interesting characters in it.
A.out of the question
B.on the whole
C.in doubt
D.under no condition
下列胃溃疡并发症中,哪种不宜用钡餐检查()
A.纳差、消瘦
B.幽门梗阻
C.慢性胃穿孔
D.溃疡癌变
E.活动性大出血