f*********y
发帖数: 536 | 1 很早以前的一个面试题，懂行的来讲讲。
Question 6: You are asked to developed methods for the quantitative analysis
of these volatile organic compounds. For each of the compounds listed
below, briefly describe your proposed method for analysis, including sample
collection, analytical instrumentation, detection method, and QC protocols.
(15 points)
a) toluene
b) ethanol
c) formaldehyde
1. Please explain the difference between a quality control process and a
quality assurance process. | f*********y
发帖数: 536 | | S*****n
发帖数: 6055 | 3 用鼻子，很灵的
detection limit ppb level
【在 f*********y 的大作中提到】
: no one knows?
| E***n
发帖数: 308 | 4 GC
analysis
sample
【在 f*********y 的大作中提到】
: 很早以前的一个面试题，懂行的来讲讲。
: Question 6: You are asked to developed methods for the quantitative analysis
: of these volatile organic compounds. For each of the compounds listed
: below, briefly describe your proposed method for analysis, including sample
: collection, analytical instrumentation, detection method, and QC protocols.
: (15 points)
: a) toluene
: b) ethanol
: c) formaldehyde
: 1. Please explain the difference between a quality control process and a
| p**********g
发帖数: 378 | 5 headspace GC
detection method depends on the detection limit (ppm or ppb), TCD, FID, ECD
or GCMS(most sensitive one)
sample prep depends on sample matrix...
analysis
sample
【在 f*********y 的大作中提到】
: 很早以前的一个面试题，懂行的来讲讲。
: Question 6: You are asked to developed methods for the quantitative analysis
: of these volatile organic compounds. For each of the compounds listed
: below, briefly describe your proposed method for analysis, including sample
: collection, analytical instrumentation, detection method, and QC protocols.
: (15 points)
: a) toluene
: b) ethanol
: c) formaldehyde
: 1. Please explain the difference between a quality control process and a
| d***e
发帖数: 1215 | |
|
