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daisy-z

铜虫 (初入文坛)

[求助] 残留分析文献中一处看不懂的地方。。悬赏10金币

The instrumentdetection limits (IDL) for trifloxystrobin, metabolite
CGA 321 113 and tebuconazole were calculated from seven
injections of standard solutions of 0.1 μgmL−1 of each pesticide
in the following manner:
IDL (μgmL−1) = (SD × t99 × C)/Astd
where SD is the standard deviation of the peak areas of replicate
injections, t99 is the Student t-value at a 99% level of confidence,
C is the concentration of pesticide (μgmL−1) and Astd is the
mean peak area of the corresponding pesticide.
t99是什么意思啊。。。。
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daisy-z

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引用回帖:
3楼: Originally posted by yaofei888 at 2012-05-17 19:19:20:
这是统计数学问题,一般懒得查表,有的规定做10次空白,检出限为空白标准偏差的3倍
一般用的公式IDL=我把上式简化为:IDL (μgmL−1) = t99 × (SD × C)/Astd,其中(SD × C)/Astd可以看做浓度的标准偏差, ...

谢谢
4楼2012-05-18 21:52:09
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yaofei888

禁虫 (小有名气)

★ ★ ★ ★ ★ ★ ★ ★ ★ ★
感谢参与,应助指数 +1
daisy-z: 金币+10, ★★★很有帮助, 谢谢 能说的更具体点吗 2012-05-17 17:23:01
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2楼2012-05-17 11:08:28
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yaofei888

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3楼2012-05-17 19:19:20
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