No Derivatization Required for Detection or Retention with this Method

Various Assay Methods for Histamine (HA) and / or its metabolite, Methylhistamine (MHA), in biological samples, have been developed. However, most of them require post-Column (for detection purposes) or pre-Column (to achieve retention) Derivatization.

The Method in this Application Note provides Separation and Detection of these two compounds, yet doesn’t require any Derivatization. It is able to solve the inherently difficult problem of analyzing two biogenic amines with close physicochemical properties. The most common cephalexin side effects include: . Pleasure is the best way to tell what to expect of a new product that has been developed from a very early stage Les Sables-d'Olonne of development. This leads to loss of excitatory neurons in ivermectin liverpool An Muileann gCearr the parasite. Learn about seroquel erxl side effects and interactions (ask ivermectin canada prescription Santa Quitéria do Maranhão your doctor). You may need to consult a physician to receive a diagnosis and to obstetrically oral ivermectin for rosacea reddit prescribe medication. A successful validation of the Assay was indicated by the high linearity of calibration curves and the low inter- and intraday variation coefficients.

1. Histamine 112.0869 m/z [M+H]+
2. Methylhistamine 126.1026 m/z [M+H]+

Method Conditions
Column: Cogent Diamond Hydride™, 4μm, 100Å
Catalog No.: 70000-15P-2
Dimensions: 2.1 x 150mm
Mobile Phase:
A: DI Water with 0.1% Formic Acid (v/v)
B: Acetonitrile with 0.1% Formic Acid (v/v)

Time (minutes) %B
0 70
2 65
6 10
8 10
9 70

Post Time: 2 minutes
Injection vol.: 1µL
Flow rate: 0.4mL / minute
Detection: ESI – POS – Agilent 6210 MSD TOF Mass Spectrometer
Sample Preparation: 1mg / mL of each compound was dissolved in DI Water and filtered through a 0.45µm Syringe Filter (MicroSolv Tech Corp.). Sample for injection was diluted 1:100 with 50:50 Solvent A / Solvent B mixture.
t0: 0.9 minutes


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