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#1. 氣相層析火焰離子化偵檢器(GC-FID) - 三福氣體
氣相層析- 火焰離子化偵檢器或GC-FID 是一種極為常見的分析技術,廣泛用於石油化學產品、製藥與天然氣市場。 FID 通常使用氫氣/空氣火焰,樣品會通入此火焰中以將有機 ...
調用EAG進行氣相色譜(GC)分析,定量揮發分析,純度分佈定量,殘留溶劑定量. ... GC/FID 幾乎對所有含有碳氫化合物且會燃燒的化合物都敏感; 例如芳香族和氯化VOC、 ...
#3. 氣相層析/火焰離子化偵測法
測器(GC / FID)中測定樣品中從C2 至C12 等56 種有機光化前驅物. (Precursors)。 二、適用範圍. 本方法適用於空氣污染防制法相關管制項目之檢測,在層析設計上.
#4. 四. 環境檢驗技術(二)
氣相層析儀(GC). 火焰離子偵測器(GC/FID). 一般有機物之檢驗(測定濃度較高時適用). 電子捕捉偵測器(GC/ECD). 含氯有機物之檢驗(多氯聯苯、有機氯農藥).
#5. [心得] 淺談GC-MS、GC-FID - 精華區Aromatherapy - 批踢踢 ...
GC ,是經過偵測器(detector)跑出一張層析圖(GC的detector是MS或FID或其他), 圖譜比較圓滑,GC/MS因為有經過MS,sample被打成小片段,(簡單比喻) 所以 ...
總而言之,火焰離子化檢測器(FID)是氣相色譜儀中最常用的檢測器之一。 它的應用範圍很廣。 例如,使用常規的火焰電離檢測器仔細分析飛機上的汽油,煤油。 煤油的成分對於 ...
#7. 氣相層析儀GC-2014 - 台灣島津科學儀器股份有限公司首頁
火焰離子偵測器(FID, Flame Ionization Detector) ... 實驗範例: 利用頂空進樣HS-GC-FID分析藥品中5種微量殘留有機溶劑. 熱導度偵測器(TCD, Thermal Conductivity ...
氣液色譜法(英語:Gas chromatography,又稱氣相層析)是一種在有機化學中對易於 ... 它們的熱導性能在檢測器檢測的溫度下與載氣不同),而FID則主要對烴類響應靈敏。
GC -FID氣相層析- 火焰離子化偵檢器 利用氫氣和空氣燃燒產生火焰將有機物在高溫下進行熱解離子化,當電場作用下形成離子流時再運用電極引為電流加以偵 ...
2017年底推出全新第十一代的Nexis GC-2030,擁有世界最高感度(MDQ1.2 pgC/s)與再現性,搭配觸控 ... 火焰離子偵測器(FID): 分析含CH鍵之分析物,為GC最普遍之偵測器。
#11. Flame Ionization Detector (FID) for GC | Agilent
Flame ionization detection is the most commonly used GC detection method due to it's superior ability to measure hydrocarbons. Using a carrier gas, ...
#12. 以頂空注射器連結氣相層析儀(HS-GC/FID) 建立食品用洗潔劑中 ...
本研究在提昇檢驗效率考量下,前處. 理直接以二甲基甲醯胺溶劑稀釋後,以頂空注射器連結氣相層析儀(HS-GC-FID)分析食. 品用洗潔劑中甲醇之含量。經實際測試結果顯示,本 ...
#13. Gas Chromatography With Flame Ionization Detection
GC with flame-ionization detection (FID) is widely used for lipids analysis. Sample preparation for this technique includes preseparation of lipid classes, ...
#14. 氣相色譜質譜| 台南市大學路一號自強校區| GC/MS 代測服務
(GC-MS/FID/TCD Detector examine Service) ... 是分析和定量有機揮發性和半揮發性化合物的分析技術。 GC(Gas chromatography,氣相色譜法)是使用溫度控制的毛細管柱,將 ...
#15. gc fid檢測器批發、促銷價格 - 阿里巴巴商務搜索
阿里巴巴為您找到47條gc fid檢測器產品的詳細參數,實時報價,價格行情,優質批發/供應等信息。
#16. How does a Flame Ionization Detector work? - PEAK Scientific
An FID uses a flame to ionize organic compounds containing carbon. Following separation of the sample in the GC column, each analyte passes ...
#17. GC-FID and Olfactometry-Assisted Assessment of Odors from ...
The samples were tested as per ČSN EN 13 725 (2005) and ISO 16000-6 (2011) criteria using GC-FID (gas chromatography-flame ionization ...
#18. 氣相層析儀(GC-FID) 教育訓練 - 大仁科技大學
議程. 時間. 內 容. 主講人/聯絡人. 8:30~9:00. 報到. 詹雅晴 研究員. 蔡淨薇 研究員. 9:00~9:50. 1.氣相層析儀(GC-FID)教育訓練原理. 2. GC-FID儀器簡介.
#19. 轉知:氣相層析儀(GC-FID)教育訓練- 美和科技大學食品營養系
主旨:本校貴重儀器暨認證檢驗中心與食品安全守護聯盟訂於107年11月30日(星期五),舉辦「氣相層析儀(GC-FID)教育訓練」,敬請惠予公告並鼓勵所屬師生及業界廠商踴躍 ...
#20. 37 FAMEs by GC/FID in 11 Minutes on Zebron ZB-FAME (20 m)
GC Application #23839: 37 FAMEs by GC/FID in 11 Minutes on Zebron ZB-FAME (20 m). Column used: Zebron ZB-FAME, GC Cap. Column 20m x 0.18mm x 0.15um ...
#21. GC(Gas Chromatograph)分析原理@ 層析儀器 - 隨意窩
GC 的檢測器依訊號產生方式可分成全偵測器與選擇性偵測器兩類,全偵測器能偵測所有物質,最常使用的有TCD(Thermal Conductivity Detector)及FID(Flame Ionization ...
#22. Evaluation of GC-APCI/MS and GC-FID As a Complementary ...
GC is, without doubt, one of the most important and widely applied techniques in modern analytical chemistry, and FID has often been the first choice for GC ...
#23. gc fid - 英中– Linguee词典
大量翻译例句关于"gc fid" – 英中词典以及8百万条中文译文例句搜索。
#24. GC-FID method for high-throughput analysis of residual ...
Gas Chromatography -Flame Ionization Detection (GC-FID) analysis for quantitation of residual solvents in drugs and synthetic intermediates is one of the ...
#25. 以氣流調節式GC×GC–TOF MS / FID 檢測芳香族過敏原
本研究工作展現了如何透過氣流式調制裝置的GC×GC,分析84 個過敏原成分的標準. 品,進行檢測的同時一方面通過TOF-MS 以確認定性的結果,並藉由FID 同步完成可. 靠的定量 ...
#26. 186007651 GC FID ALS Qualification Standards Kit - Waters ...
GC standards kit for system assessment of GC systems containing a FID detector and liquid autosampler. Kit contains standards appropriate for verification ...
#27. 氣相層析 - 科學Online - 國立臺灣大學
氣相層析(gas chromatography, GC) 在有機化學中,是一種用於分離、純化易揮發、熱 ... TCD) 與火焰離子化偵測器(flame Ionization detector, FID)。
#28. Gas Chromatography (GC-FID/TCD/FPD) | Lucideon
Gas Chromatography (GC-FID/TCD/FPD Analysis) ... Gas Chromatography (GC) provides a quantitative analysis of volatile and semi-volatile organic compounds found in ...
#29. TOF News - 台灣力可儀器股份有限公司
當考慮替換GC-FID/ECD時,為何還要買另一台相似的設備?為何還要用不同的管柱繼. 續複製分析以解決共流物問題?並且,您如何能保證不用面對GC-FID/ECD ...
#30. Gas Chromatography (GC) with Flame-Ionization Detection
Flame-ionization detection (FID) is a good general detector for organic compounds in GC that detects the amount of carbon in a sample.
#31. Standard Operating Procedure For GC-FID Detection of ...
Standard Operating Procedure For GC-FID Detection of Ambient Volatile Organic Compounds (SOP 259). Thermal Desorption Gas Chromatograph-flame Ionization ...
#32. GC-FID Test Mix (3 components) - Restek
Certified reference materials (CRMs) manufactured and QC tested in ISO-accredited labs satisfy your ISO requirements. GC-FID Test Mix (3 components). Catalog # ...
#33. Optimizing Sensitivity in GC–FID Analysis - Chromatography ...
It is often possible to achieve better sensitivity and lower limits of detection and quantitation using standard gas chromatography ...
#34. 226 questions with answers in GC-FID | Scientific method
I have a GC-FID to determine methanol in formaldehyde and concentrated urea-formaldehyde. But, i'm trouble with the method to do such analysis. Thanks for the ...
#35. VOC線上監測困難點及對處理系統的影響
GC 儀器量測時,出現於THC. 與CH4 以外的peaks ... 酸鹼分子除造成FID 及其他金屬腐蝕外,更造成信號干擾. 4.相對於一般voc, ... 單FID Detector GC-FID + 6測點選擇閥,.
#36. GC/FID - Laboratory for Isotopes and Metals in the ...
Hewlett Packard 5890 Series II Gas Chromatography with Flame Ionization Detection (GC-FID), located in 237 Deike. Scientific Director:
#37. Instant Connect Electron Flame Ionization Detector (FID) for ...
... compounds over a wide linear dynamic range using the Thermo Scientific™ Instant Connect Flame Ionization Detector (FID) for TRACE™ 1300 GC Series.
#38. Analytical method validation of GC-FID for the simultaneous ...
An accurate gas chromatography coupled to a flame ionization detector (GC-FID) method was validated for the simultaneous analysis of light hydrocarbons ...
#39. 2329 苯Benzene - 職業安全衛生研究所
方法:GC/FID. 分析物:碳氫化合物,如上述. 脫附:1 mL CS2,放置30分鐘以上. 注射量:2μL. 溫度注射器:步驟6.4. 偵測器:步驟6.4. 管柱:步驟6.4.
#40. 氣相層析儀-火焰離子化偵測器(GC-FID)壹組 - 開放標案
招標單位:經濟部標準檢驗局高雄分局,招標金額:2000000,招標日期:2021-02-04,標案案號:110BSMIKB12,分類:財物類.
#41. "Method development and validation for the GC-FID assay of ...
This paper describes the development and validation of an isothermal gas chromatography-flame ionization detection (GC-FID) method for the assay of ethanol ...
#42. GC FID - Faculty of Industrial Sciences and Technology
gcfid. INTRODUCTION. Agilent's 7890A GC gives you everything you need to take your lab to the next level of GC and GC/MS performance, ...
#43. Assessing the influence of neglected GC-FID variables on the ...
Analytical gas chromatography in line with a flame ionization detector (GC-FID) method was developed and validated for direct determination ...
#44. Gas Chromatography (GC-FID/TCD) - Joint Center for Energy ...
Gas Chromatography (GC-FID/TCD). For routine and robust analysis, gas chromatography with both flame ionization (FID) and thermal conductivity (TCD) detectors ...
#45. GC-FID | Otto H. York Center for Environmental Engineering ...
GC -FID · HP 5890 GC with two FIDs and HP Automatic Liquid Sampler. The EzChrom Elite Chromatography Data System for GC Control, data acquisition and processing.
#46. GC-FID response factor是受什麼影響? - 建宏層析企業股份有限 ...
GC /FID是將分離出的有機物於氫氧以火焰燃燒解離受電場匯集成電流的一種檢測方式。分析物是否易於燃燒裂解,決定了感度,例如感度:CH4>CH3CH3>CH2=CH2>Acetylene.
#47. 14:9 脂肪酸甲酯並探討定量方法之差異作者
利用GC-FID 測得順、反-14:9 脂肪酸甲酯並探討定量方法之差異. 1. 壹○前言. 一、研究動機. 近年來含有反式脂肪酸的食物總在不知不覺被我們吃下肚,「針對.
#48. New cylinder-free auto-GC-FID range - Petro Industry News
They succeeded by combining Gas Chromatography (GC) analysers with Flame Ionisation Detection (FID) to enable the analysis of Volatile Organic Compounds ...
#49. Basic of Gas Chromatography
▫GC 屬於色層分析法的一種,以氣體當作流動相而得名,其. 分析特點為. ▫ 高選擇性 ... GC 分析不適用於以下的狀況 ... I.D. (內徑) :0.53 mm-GC-FID->3ml/min.
#50. Industrial GC with FID & TCD - Buck Scientific
Buck Gas Chromatography systems come with a 2 year warranty and are ... 910 GC with FID & TCD detectors 30 Meter column, and built-in air compressor.
#51. Development and Validation of a GC-FID Method for ...
analytical conditions for the determination of methylmalonic acid using a gas chromatography/flame ionization detector (GC-FID) are studied ...
#52. GC-MS/FID/ECD/TCD | Analytical Services Unit - Queen's ...
GC -MS/FID/ECD/TCD. Gas Chromatography with Mass Selective Detector, Flame Ionization Detector, Electron Capture Detector and Thermal ...
#53. gc fid是什么_百度知道
GC (Gas Chromatography)就是气相色谱法. FID (Flame Ionization Detector )就是火焰离子化检测器,行内也有称为氢火焰检测器。是利用气相色谱法GC ...
#54. GC-FID - Acronyms and Abbreviations - The Free Dictionary
GC -FID. Acronym, Definition. GC-FID, Gas Chromatograph(y) - Flame Ionization Detector ...
#55. GC FID Output - Chromatography Forum
Discussions about GC and other "gas phase" separation techniques. 12 posts Page 1 of 1. GC FID Output.
#56. Quantitative GC-FID and UHPLC-DAD Evaluation of Bioactive ...
Quantitative GC-FID and UHPLC-DAD Evaluation of Bioactive Compounds Extracted from Ginkgo biloba. Author(s): Alessandra von Ahn , ...
#57. Product information LC-GC-FID online analysis - Shimadzu ...
Product information LC-GC-FID online analysis. Thank you very much for your interest in our products. Please complete the contact details and send it.
#58. Capillary FID GC - SRI Instruments
In addition to a wide range of general gas chromatography applications, the Capillary FID GC System is excellent for both environmental testing and quality ...
#59. 以GC/FID及GC/ECD同時偵測高科技工業鄰近地區空氣中揮發 ...
標題: 以GC/FID及GC/ECD同時偵測高科技工業鄰近地區空氣中揮發性有機物背景濃度之研究. Monitoring study of VOCs concentrations in high-technology industrial area ...
#60. Packed GC FID Cleaning Kit - - Sigma-Aldrich
Packed GC FID Cleaning Kit. undefined. Synonyms: . CAS null. Molecular Weight null. Browse Packed GC FID Cleaning Kit and related products at ...
#61. Gas Chromatography System (GC-FID & GC-MS) - Nanyang ...
GC -FID is used in analytic chemistry for separating and analyzing compounds that can be vaporized without decomposition. The GC- FID can detect almost all ...
#62. GC-FID_哔哩哔哩(゜
#63. Gas Chromatography | GC Instruments | PerkinElmer
Clarus 590 and 690 GC. Better characterization and fewer reruns with wide range flame ionization detector (FID); Lower reporting limits ...
#64. GC-FID | Materials Characterization Facility
Home ›; Capabilities & Instruments ›; Gas Analysis ›; GC-FID. GC-FID. Trace Gc Ultra. Thermo Trace GC-FID. Location. 147 Stepan Chemistry Hall. Capabilities.
#65. A GC-FID method for analysis of Lysinoalanine - Consejo ...
A GC-FID method for analysis of Lysinoalanine. 1. Antonia Montilla, José Ángel Gómez-Ruiz, Agustín Olano, María Dolores del Castillo.
#66. Publication Using GC/FID Method to Analysis 20 ...
Reportno. AHRI report No.39. Topic. Using GC/FID Method to Analysis 20 Organochlorine Pesticides. Department, Animal Health Researdi ...
#67. PGRL GCFID Qualitative Analysis Method for Hydrocarbons
Chromatograms generated from hydrocarbon fluids by gas chromatography with flame ionization detection (GCFID) are interpreted to derive ...
#68. Cannabis Potency Analysis by GC-FID with Helium Carrier Gas
In this application note we examine the potency levels in Cannabis using a Scion Instruments 436-GC with FID. Read more...
#69. EPH by GC/FID (TN) #UST-450H - NSI Lab Solutions
Home · Environmental Reference Materials · Organics · UST Standards · EPH by GC/FID (TN) #UST-450H.
#70. gcfid 分析
23 列氣相層析火焰離子化偵檢器(GC-FID) 氣相層析– 火焰離子化偵檢器或GC-FID 是一種極為常見的分析技術,廣泛用於石油化學產品、製藥與天然氣市場。
#71. gas chromatography-flame ionization detector-mass ...
gas chromatography -flame ionization detector-mass spectrometer (GC-FID-MS) ... laboratory device consisting of gas chromatography apparatus coupled to a ...
#72. b1020 super clean gas filter kit for gc-fid fuel gas filter kit - GL ...
B1020 SUPER CLEAN GAS FILTER KIT FOR GC-FID FUEL GAS FILTER KIT. Print; Email. SKU: 3001-18315. Available to Order: 1000000 in stock.
#73. GC-FID Analysis of CBD and THC - AZoLifeSciences
GC -FID has recently been used to identify and quantify the ... Gas chromatography (GC) is a frequently employed chromatographic method to ...
#74. 火焰離子化檢測方法(FID) - 每日頭條
火焰離子化檢測方法FID1958年Mewillan和Harley等分別研製成功氫火焰離子化檢側器,它是典型的破壞性、質量型檢測器,是以氫氣和空氣燃燒生成的火焰為 ...
#75. New Cylinder-free Auto-GC-FID Range - Chromatography ...
Gas Chromatography (GC) analysers with Flame Ionisation Detection (FID) allow the speciation of Volatile Organic Compounds (VOCs) with exceptional ...
#76. Dual Channel Gas Chromatograph with Flame Ionisation ...
Dual Channel Gas Chromatograph with Flame Ionisation Detector (DC-GC-FID). The Dual Channel Gas Chromatograph with Flame Ionisation Detectors is capable of ...
#77. Development and validation of a GC-FID assay for ... - SciELO
However, there is no gas chromatographic method with flame ionization detection (GC-FID) for determination of FLU in pharmaceutical preparations. Therefore, we ...
#78. Method 8015D: Nonhalogenated Organics Using GC/FID ...
samples by direct aqueous injection onto a different GC column than is used ... Gasoline range organics may be introduced into the GC/FID by purge-and-trap.
#79. Cannabis GC-FID Method Development - SCIENCE ...
Explore our newest method development analysis on the determination of residual solvents and terpenes in cannabis using GC-FID.
#80. GC-FID Analysis and Antibacterial Activity of the Calyptranthes ...
GC -FID Analysis and Antibacterial Activity of the Calyptranthes concinna Essential Oil against MDR Bacterial Strains · Abstract · Share and Cite · Article Metrics.
#81. FID and Carrier Gas Filter Kit for GC-FID - Emerald Scientific
GC -FID instruments rely on clean, pure gas streams for carrier gas (helium, hydrogen, or nitrogen) and FID fuel gases (hydrogen, nitrogen, and zero air). If the ...
#82. Secondary cold trap enrichment and GC-FID (Gas ... - Google
The invention belongs to the technical field of detection of hydrogen phosphide and discloses secondary cold trap enrichment and GC-FID (Gas ...
#83. GC-FID- and Acyl Carbon Number-Based Determination of ...
GC -FID- and Acyl Carbon Number-Based Determination of Characteristic Groupings of Complex Triglyceride (Benefat S and Other) Mixtures.
#84. Analytical Aspects of the Flame Ionization Detection in ...
The initial development of gas chromatography (GC) is deeply interconnected with lipid ... Flame ionization detector (FID) and the differential response.
#85. GC-FID´s | Chalmers
Thermo GC-FID (2 systems). One system using helium as carrier gas and another using hydrogen; Used mainly for quantitative bioanalytical ...
#86. GC-SAW and GC-FID performance comparison for fast ...
GC -SAW and GC-FID performance comparison for fast analysis of volatile organic compounds. Jitender Kumar 1, 2, Vinod Kumar 3, Vinay Kumar Singh 4*, ...
#87. NOAA CSL: Chemical Processes & Instrument Development
Chemical Processes & Instrument Development: Instruments. Gas Chromatography (Flame Ionization Detection-Electron Capture) Mass Spectrometer (GC/(FID-EC)/MS ...
#88. Selecting Makeup Gas for GC with FID | Lab Manager
Selecting Makeup Gas for GC with FID ... When gas chromatography is employed for the detection of trace compounds, the characteristics of ...
#89. Facilities / Instrument,GC-FID/FPD(S).NPD - CSIR-NEERI ...
Facilities / Instrument,GC-FID/FPD(S).NPD - CSIR-NEERI Hyderabad Zonal Centre.
#90. 最大化实验室空间:你的GC-FID发生器符合要求吗?
Precision hydrogen SL专门为气相色谱火焰检测器提供氢气,是最小的GC-FID氢气发生器,只需要最小的工作台空间,能够生产纯度为99.9995%的氢气。
#91. Headspace gas chromatography with flame ionization ...
Headspace gas chromatography with flame ionization detection (HS-GC-FID) for the determination of dissolved methane in wastewater.
#92. Allergenic fragrance testing with GC-FID/GC-MS - Separation ...
This article discusses the introduction of new certified reference materials and their analysis by GC using an ionic liquid column as an alternative with ...
#93. Optimization and Validation of a GC–FID Method for the ...
Quantification of the solvent fermentation products based on gas chromatography with a flame ionization detector (GC–FID) has also been reported ...
#94. 24.火燄離子偵測器(GC-FID)之氣相層析儀分析樣本時
火燄離子偵測器(GC-FID)之氣相層析儀分析樣本時,最常用的脫附溶劑為何? (A)二硫化碳 (B)水 (C) 汽油 (D)香蕉油。 編輯私有筆記及自訂標籤.
#95. Improve your GC-FID sensitivity - Labmate Online
Available as a stand- alone system or combined with the VICI DBS hydrogen generators to form an all-in-one FID Gas Station solution for GC combustion ...
#96. What is the difference between HS-GC-FID and GC-MS?
On March 8, 2011, in Chemistry, Equipment, GC-FID & GC/MS, ... where the lid on top of the GC is open is where the Flame Ionization Detector (FID) is housed.
#97. TD-GC-FID/MS for automatic and continuous VOC monitoring ...
TD-GC-FID/MS for automatic and continuous VOC monitoring in ambient and industrial air ... Ambient air is polluted by many Volatile Organic Compounds (VOCs) ...
#98. fid gc 原理氣相色譜火焰離子化檢測器 - LHLV
按一下以檢視5:2411/6/2020 · GC – 氣相色譜- 五個動畫-簡單原理,移動相,分流和不分流注射,樣品如何通過毛細管柱,FID火焰離子化檢測器工作原理小燒杯課堂5714 播放· 5 ...
gc-fid 在 [心得] 淺談GC-MS、GC-FID - 精華區Aromatherapy - 批踢踢 ... 的推薦與評價
本來聽說PPT這個版有說許多芳香療法的資訊可以看,自己本身也有在用,
本來也想推薦幾個我心目中好的品牌,在努力的爬文之後
我對這個版開始害怕,只要用字遣詞不當,就馬上可能被質疑或怎樣
看到越後面開始出現一堆專有名詞,
說句公道話,大家在講這些專有名詞時都不把話說清楚,是欺負大家不懂嗎?
要講也要讓大家瞭解這些名詞的定義與這些儀器到是底做啥用的,
打高空只會讓討論更沒意義。
我也不是專業人士,但我知道這些所以我願意跟大家分享,至於推薦哪種品牌好
我不敢推薦了:
就從GC/MS/FID這堆專有名詞談起吧
GC 是氣相分離
GC/MS/FID就是:GC接上MS or FID。
GC,是經過偵測器(detector)跑出一張層析圖(GC的detector是MS或FID或其他),
圖譜比較圓滑,GC/MS因為有經過MS,sample被打成小片段,(簡單比喻)
所以跑出來的圖譜是尖銳的peak,每一支peak都可以在相連的電腦上用滑鼠放大、點開,
進入電腦的database比對,大概可以知道那支peak包含幾個成分、化學結構等。
先經過GC之後分離出來的各種單離成分..再經過質譜儀來測定它的分子結構.首先可以由圖
譜知道這個東西的分子量。然後根據其他的線索找出它的結構式.色層分析的作用是能夠純
化出很多重要的成分。
質譜儀是用來定性的。
定量直接用FID就好了,也比較便宜一些些。
GC是用來單離沸點比較低的東西..油類比較多..事先可能要做前處裡(例如酯化)
GC 氣相色層分析法
其原理主要是以載氣(carrier gas) 將氣體帶入分離管柱(column)進行各項氣體成分分離,
然後通過偵測器(FID/MS)而被檢測出。在此過程中,各氣體成分對分離管柱內填充物各具不
同吸附力而產生移動速度之差異而分離。因此藉由各成分通過偵測器時間之不同,可判定氣
體種類及數量並可由紀錄器波峰面積來計算濃度。
氣體分析定量的相關因素如下:
1. 載流氣體種類與流速之選擇。
2. 分離管填充劑之選擇是分離各項成分之最重要因素,選擇以分子篩5A、Porapak N 及
HayeSep N為主。
3. 偵測器之定量使用火焰離子偵測器(FID)。
4. 檢量線製作是利用不同濃度之標準氣體與其波峰面積製成檢量線,作為氣體定量之依據
GC-FID 氣相層析儀/火焰離子化分析法
GC-MS 氣相層析質譜儀
FID 動作原理係藉由一內部幫浦將空氣抽入儀器內,空氣中之有機分子被一氫氣火焰所游離
化,產生之離子及自由電子被吸引至賦予定額電壓之電極而產生電流。電流之大小以一電流
計量測,其輸出電壓與游離化有機分子之碳原子數目成比例,可以用氣體標準品加以校準。
火焰離子偵測器對碳氫化合物偵測,比對其他有機化合物靈敏。其對烷類、烯類及芳族化合
物相同碳數之化合物之感度大致相同。
簡單的說法如下:
GC 利用把sample氣化 用氣體分離
MS 是直接測質量 還有他的特定解離片段
FID 用火焰燃燒方式 把物質離子化 然後去看她特定發射光譜
一般常用GC是用FID,GC-MS就是用MS做檢測器,兩者分析好壞皆以column為主,但是MS可以
到精準,而且MS可以做未知物分析,判斷分子結構(通常會附上圖庫讓你做比對判斷,不過
也要各位都看的懂才行,如果看不懂就請相信認證吧),但是單靠GC要做未知物分析,恐怕
有難度而且除非操作者超強否則不容易做到,當然我也相信這個版或許有這樣的強者,不然
那些不講道理的高深批判是哪來的。
所以不管是GC-MS還是GC-FID都是可以檢測成分,差別就在精準度上,一般說來MS比FID的偵
測極限高多了,失真率也相對降低,但兩者都是可以相信的檢驗方式,其實說穿了一點都不
偉大(對一般不懂的人可真的就偉大了),這些只是檢驗成分的東西,既然檢驗出來是OK的
當然就是可以相信的。
講這麼多也是希望大家能懂什麼是 GC-MS、GC-FID,不要再被那些高深的專家給搞的一頭霧
水,當然重點還是有通過這些檢測的就是可以相信的就是了。
至於那些什麼簡易測試法大家玩玩也是可以的,畢竟還是有一些簡單的原理在裡面,相信這
些資訊對大家有幫助,至於來這個版推薦產品小弟永遠不敢了。
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作者: prestonia (prestonia ) 看板: Aromatherapy
標題: Re: [心得] 淺談GC-MS、GC-FID
時間: Mon Sep 25 22:53:21 2006
容我道歉,當日顧著嘲弄,沒把這些東西寫清楚,非常謝謝您的熱心整理分享。
只是我以為,一家公司要宣傳,總要搞清楚宣傳的內容吧?
所以也寫了,不是要質疑FID的結果,
但是,不該用FID的圖譜,說是MS的分析圖
張冠李戴,這樣對FID不公平哪 @_@
※ 引述《xision (xision)》之銘言:
: 所以不管是GC-MS還是GC-FID都是可以檢測成分,差別就在精準度上,一般說來MS
: 比FID的偵測極限高多了,
呃,我以為是低很多(數值上)?FID應該做不到ppb等級?
撇開專有名詞不談,我其實覺得,機器畢竟只是機器,進去啥就出來啥
而精油是活生生的自然農產品,有許多微妙細緻的變化
是否符合某些成分標準的就是「好」的精油?見仁見智囉
說不定以能量測試之類的更能判別精油的「好」「壞」?
太形而上了大概....
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作者: yhy (遺忘是件好事情) 看板: Aromatherapy
標題: Re: [心得] 淺談GC-MS、GC-FID
時間: Thu Sep 28 14:05:47 2006
※ 引述《prestonia (prestonia )》之銘言:
: 容我道歉,當日顧著嘲弄,沒把這些東西寫清楚,非常謝謝您的熱心整理分享。
: 只是我以為,一家公司要宣傳,總要搞清楚宣傳的內容吧?
: 所以也寫了,不是要質疑FID的結果,
: 但是,不該用FID的圖譜,說是MS的分析圖
: 張冠李戴,這樣對FID不公平哪 @_@
: ※ 引述《xision (xision)》之銘言:
: : 所以不管是GC-MS還是GC-FID都是可以檢測成分,差別就在精準度上,一般說來MS
: : 比FID的偵測極限高多了,
: 呃,我以為是低很多(數值上)?FID應該做不到ppb等級?
: 撇開專有名詞不談,我其實覺得,機器畢竟只是機器,進去啥就出來啥
: 而精油是活生生的自然農產品,有許多微妙細緻的變化
: 是否符合某些成分標準的就是「好」的精油?見仁見智囉
: 說不定以能量測試之類的更能判別精油的「好」「壞」?
: 太形而上了大概....
GC-MS價格真的不便宜(不過到底是多少 我也不清楚 因為我平常用的是LC-MS)
所以 一般的公司沒有 也是正常的
如P大所說 拿FID的圖偽裝成MS的圖 真的對FID不公平
不過 植物畢竟是植物 不同的生長環境 採收季節等等 裡面的成分都會有些許的差異
所以做過基源鑑定 基本上就是一樣的植物
只是 公司拿FID的圖 來宣傳自己家的東西 還偽裝成MS圖 這真的有點不道德
不過如P大所說的 機器畢竟是機器
就像是 我們一般認為在韓國長的就是高麗蔘 在日本的長的就是東洋蔘
但是跑完LCMS之後 機器也許會說 他們都是一樣的東西
所以 機器是機器 至於好或不好 如果要這樣去評斷 也許不是那麼的適合
^^
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可是現在卻希望擁有更多 我真是有些貪心呢...
好像就快哭了 我在一個沒有你的世界
好像就快哭了 我是如此地愛著你...
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