gas chromatography in petroleum industry

... this industry. Con- sequently, this study examined the extent to which differ- ent shift arrangements in the petroleum industry interfere with family and social life. We also studied how coping ... shiftwork in the Norwegian petroleum industry. Locus of control and the use of coping strategies were important for shiftworkers' social and domestic/family life. Background The petroleum industry ... the experience of mastering the challenges of shift work. In a study of shiftworking nurses, socializing strategies, such as participating in sports and hobbies and keeping in contact with other

Ngày tải lên: 20/06/2014, 00:20

... characteristics of the detector. TABLE 2 Boiling Points of Normal Paraffins A,B Carbon Number Boiling Point, °C Boiling Point, °F Carbon Number Boiling Point, °C Boiling Point, °F 1 −162 −259 23 380 716 2 ... Column Gas Chromatography E355 Practice for Gas Chromatography Terms and Relation- ships E516 Practice for Testing Thermal Conductivity Detectors Used in Gas Chromatography E594 Practice for Testing ... round robin are listed in Table 7 14.2 Bias—The procedure in Test Method D2887 for determining the boiling range distribution of petroleum fractions by gas chromatography

Ngày tải lên: 20/10/2014, 17:18

... DETERMINATION OF ENDOCRINE DISRUPTING COMPOUNDS IN ENVIRONMENTAL SAMPLES USING MICROEXTRACTION COMBINED WITH CHROMATOGRAPHY/ MASS SPECTROMETRY CHANBASHA BASHEER NATIONAL UNIVERISITY OF SINGAPORE ... NATIONAL UNIVERISITY OF SINGAPORE 2004 GAS DETERMINATION OF ENDOCRINE DISRUPTING COMPOUNDS IN ENVIRONMENTAL SAMPLES USING MICROEXTRACTION COMBINED WITH CHROMATOGRAPHY/ MASS SPECTROMETRY CHANBASHA ... OF SINGAPORE 2004 GAS PREFACE Endocrine disrupting compounds (EDCs) are defined as exogenous substances (such as organotins, alkylphenols, bisphenol-A, organochlorine pesticides, polychlorinated

Ngày tải lên: 16/09/2015, 17:12

... of Chromatography Library - Volume DETECTORS IN GAS CHROMATOGRAPHY JOURNAL OF CHROMATOGRAPHY LIBRARY Volume Chromatography of Antibiotics by G H Wagman and M J Weinstein Volume Extraction Chromatography ... measuring devices in gas chromatography It is generally used for pesticide residue analysis, for pesticides containing sulphur, chlorine and nitrogen The minimum detectable amounts are in the ... 119 containing substances 146 photomultiplier I58 photon flur 130 picolines 89 I’iringer 18 I plastic, fluorinmxi 54 platinum 89 plutoniurn 66, 80 polarography 169 pulse 169 Possanzini I62 potcntial,

Ngày tải lên: 06/10/2016, 09:28

... Reducing Risk in the Petroleum Industry Machine Data and Human Intelligence Naveen Viswanath Reducing Risk in the Petroleum Industry by Naveen Viswanath Copyright © 2016 O’Reilly Media Inc All ... tailoring to suit the petroleum industry While explaining use cases, the speakers offer a glimpse into their instantiation of this world Asset-intensive industries are especially interested in maximizing ... solving problems in the hard disk drive industry since 2000 At the intersection of data, hardware engineering, and control software, he finds that the best challenges are interdisciplinary Hailing

Ngày tải lên: 05/03/2019, 08:25

... Reducing Risk in the Petroleum Industry Machine Data and Human Intelligence Naveen Viswanath Reducing Risk in the Petroleum Industry by Naveen Viswanath Copyright © 2016 O’Reilly Media Inc All ... tailoring to suit the petroleum industry While explaining use cases, the speakers offer a glimpse into their instantiation of this world Asset-intensive industries are especially interested in maximizing ... solving problems in the hard disk drive industry since 2000 At the intersection of data, hardware engineering, and control software, he finds that the best challenges are interdisciplinary Hailing

Ngày tải lên: 05/03/2019, 08:25

... in Vietnamese Petroleum Industry Methodoldy/Sample – A total of 280 questionnaires were distributed out at many oil and gas companies in Vietnam As the method is directly interviewing combining ... Huynh THE ROLE OF ETHICS INSTITUTIONALIZATION IN INFLUENCING QUALITY OF WORK LIFE AND JOB SATISFACTION A STUDY IN VIETNAMESE PETROLEUM INDUSTRY ID: 22130032 MASTER OF BUSINESS (Honours) SUPERVISOR: ... HO CHI MINH CITY International School of Business Pham Nhu Huynh THE ROLE OF ETHICS INSTITUTIONALIZATION IN INFLUENCING QUALITY OF WORK LIFE AND JOB SATISFACTION A STUDY IN VIETNAMESE

Ngày tải lên: 28/10/2019, 00:46

... O’Reilly Media, Inc D2060 Reducing Risk in the Petroleum Industry Machine Data and Human Intelligence Naveen Viswanath Beijing Boston Farnham Sebastopol Tokyo Reducing Risk in the Petroleum Industry ... tailoring to suit the petroleum industry While explaining use cases, the speakers offer a glimpse into their instantiation of this world Asset-intensive industries are especially interested in maximizing ... Mainka, can result in big numbers Even a 0.1% reduction in maintenance costs can translate into millions of dollars | Reducing Risk in the Petroleum Industry: Machine Data and Human Intelligence saved

Ngày tải lên: 12/11/2019, 22:29

... formed during food processing (drying, smoking) and food cooking at high temperature (grilling, frying, roasting, baking) (Ledesma et al., 2014; Martin Rose et al., 2015) Therefore, in this study ... processing (Zelinkova & Wenzl, 2015; Ledesma et al., 2014; Orecchio et al., 2009; Luzardo et al., 2013) Food processing techniques contribute to the increase in PAH levels including drying, roasting ... PAHs in food was limited in Vietnam Le Hong Dung et al., (2012) and Tran Cao Son et al., (2016) showed that most samples of food processed by roasting, frying and baking in Vietnam were contaminated

Ngày tải lên: 14/01/2020, 17:37

... indices Linear retention indices were obtained using gas chromatograms by interpolation between bracketing n-alkanes [28–30] A homologous series of n-alkanes (C-7 to C-40; ULTRA Scientific, Inc.; ... further improved SDE to enable determination following 2 h extractions using a microapparatus and without requiring any concentration steps before gas chromatography In 1983, Bicchi et  al [23] made ... foodstuffs and crude drugs in traditional Chinese medicine [2, 3] Jujube extract is usually used as a food additive or flavoring and is listed in the “lists of food additives” in China [4] Jujube extract

Ngày tải lên: 29/05/2020, 12:34

... for analysis of PAHs in? ?mainstream smoke GC separation conditions Injection Multimode (PTV) injection, splitless mode Injection volume 2 µl Carrier gas Helium; 1 ml/min (50 min), then 2 ml/min (until the ... programme 50C (0.8min), ramp 45C/min to 200 °C, ramp 2.5 °C/min to 225 °C, ramp 5 °C/min to 266 °C, ramp 14 °C/min to 300 °C, ramp 10 °C/min up to 320 °C (48 min) Total run time 74.762 min QQQ collision ... for determination of 16 FDA polycyclic aromatic hydrocarbons (PAHs) in? ?mainstream cigarette smoke by? ?gas chromatography? ??mass spectrometry Jana Jeffery1*  , Maria Carradus2, Karolina Songin2, Michael Pettit2,

Ngày tải lên: 29/05/2020, 12:54

... freeze-drying, addition of acid (HCl), addition of base (NaOH), addition of salt (NaCl), fresh urine and frozen urine when identifying and quantifying metabolites in 4 ml samples Freeze-drying and ... studies [15] and in the industry for preserving perishable material [16] In summary, the freeze-drying process is able to remove water from the material being processed while keeping it frozen For ... METHODOLOGY Freeze‑drying: an alternative method for the analysis of volatile organic compounds in? ?the headspace of urine samples using solid phase micro‑extraction coupled to? ?gas chromatography ‑

Ngày tải lên: 29/05/2020, 13:33

... programming was initially set to T = 35 °C (t = 5 min), then it was raised to 210  °C at 3  °C/min, next to T = 240  °C at 40  °C/min and finally holding for 10  The injection port and transfer line ... resulting from fermentation and provides some pleasant flavor [23] Performing quality control during the distillation process with the purpose of eliminating toxic compounds, but maintaining the ... used in quality control of Ecuadorian beverages such as Pájaro azúl, Puro and Pata de vaca is carried out by using conventional gas chromatography; however, it does not allow the fingerprinting

Ngày tải lên: 29/05/2020, 13:56

... was initially held at 150  °C for 4  (total run time 4  min), increased at 4  °C/min to 180  °C in 7.5 min and held there for 0.5 min (run time 12 min), then increased at 60 °C/min to 300 °C in ... standard fragment differently in the mass spectrometer giving rise to two distinctly different indolinone ions as shown in Fig. 3a, b Linearity, sensitivity and specificity During the validation study, ... simultaneous determination of codeine and diclofenac Talanta 116:1026–1032 24 Liu SC, Tsai TH (2002) Determination of diclofenac in rat bile and its interaction with cyclosporin A using on-line microdialysis

Ngày tải lên: 29/05/2020, 14:27

... selection of injection pairs We examine the robustness of intra-class match between injections of same origin against interclass distinction between injection pairings from different origins Specifically, ... seep in the Gulf of Mexico in 2006 The remaining injections correspond to distant sources unrelated to the Gulf of Mexico For example, injections 18, 19 and 20 are independent consecutive injections ... neighboring oil sources We also provide a robust quantitative measure for directly determining “match” between samples, without necessitating training data sets This is a key distinction against

Ngày tải lên: 29/05/2020, 14:31

... and Martin in 1952. Indeed it is no exaggeration to claim that many of the major advances in gas chromatography in that golden era emanated from the laboratories of the petroleum industry. ... development of gas chromatography in the 1950s and 1960s is now a fading memory of a golden era, there are still advances being made in apparatus, technique and applications. The petroleum industry ... Carrier gas: helium at 28 ml/min. Re$rences p. 40 The analysis of hydrocarbon gases 17 0 min i0'min Fig. 1.13. Capillary separation. I 20 rnin tomin I I 0 min 10 min...

Ngày tải lên: 21/02/2014, 01:21

... hydrocarbons (PAH), including the labeled PAHs used in this method as internal standards, are rapidly oxidized and/or chlorinated in water containing residual chlorine. Therefore, residual chlorine must ... disk in as little as five minutes without reducing analyte recoveries. Extract the entire sample, draining as much water from the sample container as possible. Dry the disk by maintaining vacuum ... metribuzin may break through the C-18 phase in highly contaminated samples resulting in low recoveries. 13.2.8 If cyanazine is to be determined, a separate sample must be collected. Cyanazine degrades...

Ngày tải lên: 22/03/2014, 14:20

... trials. Finally, the industry is in a state of constant transition, making it difficult to keep pace. Growth in Scale The game industry, in the earliest form that this book will discuss, began in the late ... cture view of the historical transition in scale of the industry s development teams is an instructive place to begin. Increased Graphical Depth Since the industry began, games have gradually taken ... mindset and demonstrate new skills—frequently with little or no preparation time. The game industry is not unique in facing this problem. In the course of my research, many people in other industries...

Ngày tải lên: 07/03/2014, 10:06

... or services will be eliminated. Locally competing trend turns into international competition. Instead of paying more money in gathering the information as in the past, internet and technologies ... allocation will be easier for both managers and shareholders. Finishing identifying activities likes installing, running and maintaining, counted costs will be traced to different required products ... However, in the long run, some fixed costs still need to change. As a result, a new cost accounting method is invented. Instead of sharing equally among various departments and maintaining the...

Ngày tải lên: 13/03/2014, 14:19

... the amine in a stripper, an acid gas stream containing the H 2 S that is sent to the sulfur recovery unit. The main solvents involved in amine systems in refineries are monoethanol amine (MEA), ... approaches now in use in the industry to minimize exchanger solids in the sewer is to clean bundles only in designated cleaning areas designed for solids containment. 5. In crude fractionating units, ... evaluated in one or more U.S. refineries outside the State of Washington. In many instances, refiners have reported proposed projects that were under study without indicating the eventual findings...

Ngày tải lên: 23/03/2014, 00:20