原文由 poorlittle(poorlittle) 发表:
网友hgger在http://bbs.instrument.com.cn/shtml/20100608/2599734/ 所述为 “药典明确规定了结果的有效位数要和标准一致”, 究竟中国药典中是用有效位数number of significant figures还是number of decimal places? 这是很不同的。
= = = = = =
12.5 : number of significant figures = 3
12.5 : number of decimal places = 1
我个人认为中国药典所说的有效位数是欠妥的。比方说对于相关物质,美国药典有这样的说明:
USP will express the impurity limits to two decimal place (e.g., 0.05%, 0.14%), if the limit of an impurity is below 1.0%, and to one decimal place (e.g., 1.2%) if the limit is at or above 1.0%.
如果相关物质检测出来的数据为0.00000000000000081%,标准为不大于0.05%,按中国药典的规定,结果是否就必须报告为0.0000000000000008%呢?明显没有这种必要