小成 asked in 社會與文化語言 · 1 decade ago

英翻中 麻煩盡量翻順點 贈20點

The PCDD/PCDF fraction was collected separately and concentrated

near dryness. After adding 25 ll of the C13-labeled injection standards,

the extracts were ready for instrumental analysis. The final obtained PCDD/PCDF extracts were injected and analyzed on an Agilent 6890

Capillary Gas Chromatograph equipped with a DB5-MS capillary column and coupled to a Waters Autospec Ultima HRMS. Following the chromatographic separation, the mass spectrometric parameters allowed separating PCDDs and PCDFs between the different chlorination degrees and between the C13-labeled congeners and the native C12-congeners. The HRMS

was measuring, via ‘‘selected ion recording’’ at a resolution of

10 000, two selected ions per congener group for the native, as well as the labeled components. The calculation of the toxic native compounds was done using the corresponding C13 congener as internal standard, automatically correcting for potential losses during the analytical process. For the C13-labeled standards, stock solutions of known concentrations were purchased from Wellington Laboratories (Guelph, Ontario, Canada), and diluted with nonane on a weight/weight basis to appropriate working concentrations yielding C13-labeled extraction- and injection-standards to be used at different stages of the analyti- cal procedure. The identity and number of C13-labeled standards was determined by the analytical methodology to be used. Analytical calibration standards were purchased from Wellington Laboratories and used as such. In general, a full six point calibration was performed after maintenance of HRGC/HRMS, after cleaning of the source, after changing the analytical capillary column, and if the daily calibration control check did not meet specifications. In general, the relative standard deviation of the mean response factors should not be more than

10%.

2 Answers

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  • Anonymous
    1 decade ago
    Favorite Answer

    PCDD/PCDF 分數分開地被收集了和被集中了在乾燥附近。在增加25 C13 被標記的射入標準的ll 以後,萃取物準備好有助分析。決賽獲得了PCDD/PCDF 萃取物被注射了和被分析了在Agilent 6890血絲氣體色譜分析儀被裝備以DB5-MS 血絲專欄和被結合對水Autospec Ultima HRMS 。從事色譜分析的分離, 許多光計測定的參量允許分離PCDDs 和PCDFs 在不同的氯化程度之間和在C13 被標記的congeners 和當地C12-congeners 之間。HRMS測量, 通過‘‘選擇的離子錄音’’在決議10 000, 二選擇了離子每同種類的小組為當地人, 並且被標記的組分。毒性當地化合物的演算完成使用對應的C13 同種類作為內部標準, 自動地改正為潛在的損失在分析過程期間。為C13 被標記的標準, 已知的集中的儲蓄解答被購買了從威靈頓實驗室(Guelph 、安大略, 加拿大), 並且用nonane 稀釋根據weight/weight 依據對適當運作的集中產生C13 標記了提取和射入標準被使用在analyti- cal 做法的不同的階段。C13 被標記的標準的身分和數量由分析方法學確定了被使用。分析定標標準被購買了從威靈頓實驗室和被使用了總之, 充分的六點定標執行了在HRGC/HRMS 以後維護, 在來源的清潔以後, 在改變分析血絲專欄以後, 和如果每日定標控制檢查沒有符合規格。總之, 卑鄙反應因素的相對標準偏差不應該是更多比10%。

    Source(s): 奇摩字典and ME
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  • 1 decade ago

    PCDD/PCDF 分數分開地被收集了和集中了在乾燥附近。在增加25 C13 被標記的射入標準的ll 以後, 萃取物準備好有助分析。決賽獲得了PCDD/PCDF 萃取物被注射了和被分析了在Agilent 6890 血絲氣體色譜分析儀被裝備以DB5-MS 血絲專欄和被結合對水Autospec Ultima HRMS 。在色譜分析的分離以後, 許多光計測定的參量准許分離PCDDs 和PCDFs 在不同的氯化程度之間和在C13 被標記的congeners 和當地C12-congeners 之間。HRMS 測量, 通過"選擇的離子錄音" 在決議10 000, 二個選擇的離子每同種類的小組為當地人, 並且被標記的組分。毒性當地化合物的演算完成使用對應的C13 同種類作為內部標準, 自動地改正為潛在的損失在分析過程期間。為C13 被標記的標準, 已知的集中的儲蓄解答被購買了從威靈頓實驗室(Guelph 、安大略, 加拿大), 並且用nonane 稀釋根據weight/weight 依據對適當運作的集中產生C13 標記了提取和射入標準被使用在analyti- cal 做法的不同的階段。C13 被標記的標準的身分和數量由分析方法學確定了被使用。分析定標標準被購買了從威靈頓實驗室和被使用了總之, 充分的六點定標執行了在HRGC/HRMS 以後維護, 在來源的清潔以後, 在改變分析血絲專欄以後, 和如果每日定標控制檢查沒有符合規格。總之, 卑鄙respons 的相對標準偏差

    Source(s): Yahoo Dictionary
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