CRM-DTX2-c Fin Algae Toxin-2 Standard (NRC Canada)

CRM-DTX2-c Fin Algae Toxin-2 Standard (NRC Canada) Product Introduction

Brand: Canadian NRC Standard

CRM code（货号）：CRM-DTX2-c

English name: Certified Calibration Solution for Dinophytoxin-2

Chinese name: Fin Algae Toxin-2 Standard

CAS number: 139933-46-3

Specifications0.5 mL

Validity period:

If stored unopened under the recommended storage conditions of -12 ° C, the certified concentration of CRM-DTX2-c is valid for 2 years from the date of sale.

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Product Description:

Fin algae toxin-DTX2 is a lipophilic toxin produced by marine dinoflagellates, which can accumulate in shellfish and cause diarrheal shellfish poisoning. DTX2 is a regulated structural analogue of Okada acid (OA), with a methyl group at position C35 instead of C31 [2]. CRM-DTX2-c is a certified calibration solution for DTX2 in methanol and a substitute for CRM-DTX2 [3].

Expected use:

CRM-DTX2-c is a certified calibration solution used for the development of analytical methods and accurate quantification of DTX2. This concentration is suitable for preparing dilution series for calibrating instruments such as liquid chromatography-mass spectrometry (LC-MS), as well as control samples for spiked recovery experiments.

Storage and usage instructions:

To ensure the stability of CRM-DTX2-c, ampoules should be stored at -12 ℃ or below.

It is worth noting that the volume of the solution has not been certified. Only the concentration is certified. Therefore, the contents of ampoules should not be simply transferred to a volumetric container and diluted to a certain volume.

Before opening, each ampoule should be equilibrated to room temperature and the contents thoroughly mixed. CRM solutions should use calibrated equipment for transfer to ensure accuracy. Repeated sampling and storage of CRM solution after initial opening may affect concentration values. However, users may be responsible for proving that their packaging and storage procedures do not affect concentration.

Analysis methods and value allocation:

The authentication value of CRM-DTX2-c (Table 1) is the uncertainty weighted average of the obtained results

At NRC, qNMR calibration was performed using benzoic acid, LC-MS/MS was performed using CRM-DTX2-b as the calibration agent, and LC-CAD was performed using CRM-MTX1-c as the calibration agent. The information value of 19-epi-DTX2 present in CRM-DTX2-c was 0.12 ± 0.03 ug/g by qNMR and LC-HRMS. It is common for 19-epi-DTX2 to co elute with OA in reverse phase chromatography [7]. This should be considered before using CRM-DTX2-c in a mixed solution with OA. There are trace amounts (about 1.4%) of other structure related impurities in the material.

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