Application Notes

This poster exhibits how combining XF and LC/MS technologies can provide deeper insight into the cellular and molecular metabolic response to drug treatment for cancer research.

This poster illustrates the outstanding quantification performance for large panel pesticide screening analysis in a known difficult matrix such as cinnamon, using a novel LC/TQ platform, including the Agilent 1290 Infinity II Bio LC system coupled to the 6495 Triple Quadrupole LC/MS with the Jet Stream Technology Ion Source (AJS).

This study assesses a workflow developed for PFAS analysis in wastewater, based on the existing EPA draft Method 1633 with additional PFAS of varying size and functional group. This workflow contains off-line solid phase extraction (SPE) and a clean-up step, followed by LC-MS/MS analysis, and automatic reporting using SLIMS. The workflow demonstrates a reliable solution for the targeted analysis of PFAS in complex matrices with high robustness.

This study demonstrates the 6495 LC/TQ (G6495D) is suitable for comprehensive protein quantification assays in complex matrix.

This poster demonstrates how the HILIC polar metabolite workflow is enhanced with the new 4th generation 6495 LC/TQ, and robust quantitation is enabled with new 13C metabolite transitions.

This poster shows that over 200 pesticides screened for using a DIA mode of acquisition from 0.625 ppb to 100 ppb​,​ good Mass Accuracy, Low RSD’s, and Scored Coelution of Fragment Ions​ are demonstrated.

This poster demonstrates that the Agilent 6495 triple quadrupole LC/MS system shows increased analytical sensitivity of nitrosamine impurities at the low concentration levels specified by regulatory requirements.

PSG® Biotech offers a comprehensive portfolio of pumps, sensors and flow meters engineered to protect media integrity and product quality while producing the highest yields

In an ever-evolving cannabis industry where regulatory compliance and accurate testing are paramount, staying ahead requires a deep understanding of how to build an efficient testing lab that meets compliance standards:

Calibrating detectors and monitoring devices with accurate and traceable gas mixtures in air monitoring applications is important for human and environmental health.

This article explores how to use this powerful, free, simulation tool to simplify and speed up LC–MS/MS method development.

This application note provides insight into how solvents can be efficiently dried down using a nitrogen blowdown evaporator and a guide on the best place to start.

Accurate purity assessment of oligonucleotide mixtures can be challenging due to their complexity. Daicel offers several solutions that provide unique selectivity.

Complementarity in chromatography ensures accurate purity. Daicel offers non-chiral stationary phases compatible in different modes for cyclic peptide analysis.

This short video provides an overview of a complete, end-to-end oligonucleotide workflow solutions

Characterization of oligonucleotides requires robust analytical instrumentation and methods as well as ease-of-use data analysis tools. Biocompatibility mitigates non-specific sample binding to flow path and it ensures the integrity of biomolecules and robustness of the system. In this study, two workflows, the Target Plus Impurities (TPI) and Sequence Confirmation workflows in Agilent MassHunter BioConfirm software, were carried out to characterize two oligonucleotide samples.

In this application note, the determination of oligo sequence confirmation using HILIC LC and high-resolution MS/MS data is described. As with the previous studies, an InfinityLab Poroshell 120 HILIC-Z column was used along with an Agilent 6545XT AdvanceBio LC/Q-TOF mass spectrometer.

Xylazine has emerged as a prevalent adulterant in illicit drugs. A robust SPE and LC-MS/MS method for analyzing xylazine, fentanyl, and other adulterants is presented.

In this application note, LC separation and MS1 mass identification of a variety of oligos without the use of ion‑pairing reagents is demonstrated. The LC separation allows subsequent positive mode use with little to no flushing or hardware changes. This HILIC-based method uses an Agilent InfintyLab Poroshell 120 HILIC-Z column and MS-friendly ammonium acetate-based mobile phases. The samples were analyzed on an Agilent 1290 Infinity II LC system and a 6545XT AdvanceBio quadrupole time-of-flight mass spectrometer (LC/Q-TOF).

End-to-End Workflow Solutions for Oligonucleotide Analysis - From research discovery to production QA/QC

UV-Vis spectrophotometers have been used widely for nucleic acid quantification and quality control (QC) utilizing the fact that nucleic acids have a maximum absorbance at 260 nm (1). The concentration of nucleic acids can be easily estimated using the absorbance at 260 nm and the established absorption coefficient. Often a background correction is also performed, for example collecting a baseline using a solution containing everything but the nucleic acid or by measuring the absorbance at a wavelength that nucleic acids do not absorb. Double stranded nucleic acids are bound by hydrogen bonds between the base pairs. The temperature at which double stranded nucleic acids denature to become single stranded depends on the: – sequence and length of the nucleic acid – the pH and buffer conditions – and any mismatches in base pairs between the two strands As such, the melting temperature is very useful analytical tool and can be studied by monitoring the absorbance at 260 nm as temperature is increased or decreased. As the temperature is increased, the hydrogen bonds between the strands are broken and the double stranded nucleic acid separates into two separate strands. When the strands separate, the absorbance at 260 nm increases. The transition temperature is called “melting temperature” (Tm) (1).

Columns of the YMC-Pack Diol SEC series (120–300 Å), which have distinct pore sizes, were tested for their ability to separate DNA of various lengths (10–300mer).

Despite the utility of the essential oil mixture, it has been shown that allergies can arise from some of the individual components.

Automated, high-sensitivity analysis of residual fumigants for food safety testing by multi-step enrichment–headspace–trap (MSE–HS–trap) with GC–MS.

Determine down to 8x10^9 AAV capsids and separate impurities of AAV samples by separation using a mixed-bed SEC column & highly sensitive MALS detection.

The CDS 8500 Purge and Trap electronic pressure control (EPC) is used for automated preparation of calibration curves.

The CDS 8500 Purge and Trap system is used to perform automated sample dilution to prepare calibration curves.

This application note demonstrates a novel Empore 8270 Disk to extract 125 semi-volatile organic compounds from water samples per EPA 8270E method.

This application note introduces a sample-stacking technique to improve sensitivity for low concentration polymer samples.