Application Notes

A 12-minute analytical method was developed for 122 VDs in meat. The method uses Agilent All Ions MS/MS on a Q-TOF LC/MS instrument along with the Agilent Veterinary Drugs PCDL.

PAHs were determined in a petroleum vacuum distillation residue using the Agilent 1290 Infinity Multiple Heart-Cutting 2D-LC solution with normal-phase in the first dimension and reversed-phase in the second dimension.

PAHs were determined in a petroleum vacuum distillation residue using the Agilent 1290 Infinity Multiple Heart-Cutting 2D-LC solution with normal-phase in the first dimension and reversed-phase in the second dimension.

In this application the Agilent 1290 Infinity II LC was used to determine the bitter compounds iso-alpha-acids and reduced iso-alpha-acids, and the clove-like phenolic flavor 4-vinylguaiacol in bottled beer.

In this application the Agilent 1290 Infinity II LC was used to determine the bitter compounds iso-alpha-acids and reduced iso-alpha-acids, and the clove-like phenolic flavor 4-vinylguaiacol in bottled beer.

This application note describes the use of ISOLUTE SLE+ for extraction of estrone (E1) and estradiol (E2) from human serum. Analysis is performed by an HPLC-MS/MS method that gives limits of detection of 0.001 ng/mL without derivatization or fluoride adduct stabilization. ISOLUTE SLE+ products provides high analyte recoveries, no emulsion formation and significantly reduced sample preparation time compared to traditional liquid-liquid extraction.

This poster describes how GC×GC–TOF MS is used to quickly and confidently identify key flavour compounds in tea and coffee that would be subject to extensive co-elution in a conventional GC–MS system.

This application note describes a UHPLC/MS/MS-based method for the screening and quantification of more than 250 pesticides and pesticide metabolites in food samples.

This application note describes a UHPLC/MS/MS-based method for the screening and quantification of more than 250 pesticides and pesticide metabolites in food samples.

A CHIRALPAK IG column (immobilized meta selector) was used to develop the enantioselective separation of methylclothiazide. Meta-substituted immobilized chiral selectors have been shown to have remarkable affinity for resolution of chiral compounds from different types of molecules.

Reflectron lenses are used in time-of-flight (TOF) mass spectrometers to create an electrostatic field to alter ion flow, providing for a longer flight path and therefore greater resolution.

Disinfection by-products (DBP) are an ever-present nuisance in the efforts to purify drinking water, wastewater, and municipal waters from various sources.

This Application Note describes the method transfer of a USP HPLC method for amlodipine besylate tablets to a UHPLC method using the Agilent 1290 Infinity II LC.

This Application Note describes the method transfer of a USP HPLC method for amlodipine besylate tablets to a UHPLC method using the Agilent 1290 Infinity II LC.

11-nor-9-Carboxy-THC, also known as THCA or carboxy-THC, is the main secondary metabolite of THC (the active component of marijuana) formed in the human body [1]. THCA is excreted in urine in the form of glucuronide conjugates. THCA is not psychoactive but has a long half-life of up to several days or even weeks in very heavy users, thus determination of THCA in urine plays an important role in confirmation of marijuana consumption. The Substance Abuse and Mental Health Services Administration (SAMHSA) has set the THCA cutoff concentration of confirmatory testing at 15 ng/mL. Typical sample preparation methods for THCA in urine include liquid-liquid extraction (LLE) and solid phase extraction (SPE). This application utilizes a novel sample preparation technique, QuEChERS to effectively quantitate THCA levels in human urine.

Demonstrating how the excellent sensitivity, stability and high-quality spectra produced by TOF MS can provide a rapid and robust solution for the quantitative analysis of environmental contaminants.

The development of an automated online SPE–LC–MS-MS method for the analysis of 25-OH-vitamin D2, 25-OH-vitamin D3, and 3-Epi-25-OH-vitamin D3 from human serum.

Enhancing the extraction of vitamin A and E in serum using simplified liquid extraction (SLE) significantly improves the LC–MS-MS detection of target compounds without an overly complex method or sacrificing robustness.

The development of an automated online SPE–LC–MS-MS method for the analysis of 25-OH-vitamin D2, 25-OH-vitamin D3, and 3-Epi-25-OH-vitamin D3 from human serum.

A full ESI+/ESI- 52 drug panel was performed in 7 min and 30 s, including re-equilibration (44 in ESI+ and 8 in ESI-). This rapid analysis showed great resolution and no loss in sensitivity compared to slower methods.

A full ESI+/ESI- 52 drug panel was performed in 7 min and 30 s, including re-equilibration (44 in ESI+ and 8 in ESI-). This rapid analysis showed great resolution and no loss in sensitivity compared to slower methods.

Enhancing the extraction of vitamin A and E in serum using simplified liquid extraction (SLE) significantly improves the LC–MS-MS detection of target compounds without an overly complex method or sacrificing robustness.

A simple automated extraction method using a Tecan Freedom EVO® 100 liquid handler and Phenomenex’s Novum simplified liquid extraction (SLE) 96-well plate. Analysis of isomeric cortisone and prednisolone by UHPLC by Kinetex 2.6 μm, 50 x 3 mm core-shell Biphenyl column was used to successfully separate these two compounds and their isomers.

A simple automated extraction method using a Tecan Freedom EVO® 100 liquid handler and Phenomenex’s Novum simplified liquid extraction (SLE) 96-well plate. Analysis of isomeric cortisone and prednisolone by UHPLC by Kinetex 2.6 μm, 50 x 3 mm core-shell Biphenyl column was used to successfully separate these two compounds and their isomers.

Using a single LC–MS-MS application, 12 steroids were separated. However, three separate panels are also run as an alternative method.