Dersleri yüzünden oldukça stresli bir ruh haline sikiş hikayeleri bürünüp özel matematik dersinden önce rahatlayabilmek için amatör pornolar kendisini yatak odasına kapatan genç adam telefonundan porno resimleri açtığı porno filmini keyifle seyir ederek yatağını mobil porno okşar ruh dinlendirici olduğunu iddia ettikleri özel sex resim bir masaj salonunda çalışan genç masör hem sağlık hem de huzur sikiş için gelip masaj yaptıracak olan kadını gördüğünde porn nutku tutulur tüm gün boyu seksi lezbiyenleri sikiş dikizleyerek onları en savunmasız anlarında fotoğraflayan azılı erkek lavaboya geçerek fotoğraflara bakıp koca yarağını keyifle okşamaya başlar
Unknown Polymer Additive Identification By Multimode LC-MS/MS And Multi-detectors | 10158
ISSN: 2155-9872

Journal of Analytical & Bioanalytical Techniques
Open Access

Like us on:

Our Group organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations
700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)

Select your language of interest to view the total content in your interested language

Google Scholar citation report
Citations : 3732

Journal of Analytical & Bioanalytical Techniques received 3732 citations as per Google Scholar report

Journal of Analytical & Bioanalytical Techniques peer review process verified at publons
Indexed In
  • CAS Source Index (CASSI)
  • Index Copernicus
  • Google Scholar
  • Sherpa Romeo
  • Academic Journals Database
  • Open J Gate
  • Genamics JournalSeek
  • JournalTOCs
  • ResearchBible
  • China National Knowledge Infrastructure (CNKI)
  • Ulrich's Periodicals Directory
  • Electronic Journals Library
  • RefSeek
  • Directory of Research Journal Indexing (DRJI)
  • Hamdard University
  • OCLC- WorldCat
  • Scholarsteer
  • SWB online catalog
  • Virtual Library of Biology (vifabio)
  • Publons
  • Euro Pub
Share This Page

Unknown polymer additive identification by multimode LC-MS/MS and multi-detectors

4th International Conference and Exhibition on Analytical & Bioanalytical Techniques

Wenjie Cao and Nasser Al-Harbi

ScientificTracks Abstracts: J Anal Bioanal Tech

DOI: 10.4172/2155-9872.S1.013

The identification of unknown non-volatile polymer additives is always a challenge because, unlike GC-MS, there is no commercial LC-MS library for spectrum matching. Therefore, unknown polymer additive identification is largely based on experience and standard matching. Multimode and multi-detector instruments like LC-MS/MS/DAD and GPC-MS/MS/DAD become very valuable tools in the identification of low level unknown polymer additives in different polymer matrix. The multiple MS spectra from different ionization modes, positive and negative, plus different fragmentation energies will help to understand the acidity or basicity, and the stability of the unknown additive. The retention time of the LC or GPC, and the UV spectra will further help to narrow down the candidate list of the unknown additive. We?ll present the capability and the usage of a LC-MS/MS/DAD or a GPC-MS/MS/DAD instrument for unknown polymer additive identification in a single injection.
Wenjie Cao is a Staff Scientist of the Analytical Group at the SABIC Technology Center at Riyadh. He received his Ph.D. from Professor John Calvin Giddings? Group at the University of Utah. His Ph.D. research was on polymer separation and characterization by thermal field-flow fractionation. He was working for DuPont as a research investigator before joined SABIC in 2012. He is a contributor to the book of the Encyclopedia of Chromatography and has more than eighteen publications and presentations in peer-reviewed scientific journals and international conferences.