Seeking help from someone who understands mass spectrometry MRM?

1. What is MRM?

MRM (Multiple Reaction Monitoring) is a quantitative analysis method in mass spectrometry, also known as multiple reaction monitoring. It achieves high sensitivity and high selectivity quantitative analysis of target molecules by selecting specific precursor and product ion pairs.

2. What is the principle of MRM?

MRM is based on the triple quadrupole structure of a mass spectrometer. In MRM mode, specific precursor ions are selected through Q1 (the first quadrupole), then collision-induced dissociation (CID) produces product ions from the precursor ions, and finally, specific product ions are selected through Q3 (the third quadrupole) for detection.

3. What are the advantages of MRM?

1. High selectivity:

By selecting specific precursor and product ion pairs, it can eliminate the influence of other interfering substances, thereby enhancing the selectivity of the analysis.

2. High sensitivity:

Since MRM only monitors specific precursor and product ion pairs, it can reduce background noise interference, thus increasing sensitivity.

3. High quantitative accuracy:

MRM can perform quantification through the use of internal standards. Adding internal standard substances can correct for variability in samples and errors in the analytical process, improving quantitative accuracy.

4. What are the applications of MRM in the field of biopharmaceuticals?

1. Drug metabolism studies:

MRM can be used for the quantitative analysis of drug metabolites to understand the metabolic process of drugs in the body and the formation of metabolic products.

2. Pharmacokinetic studies:

MRM can be used for the quantitative analysis of the absorption, distribution, metabolism, and excretion (ADME) processes of drugs in the body, assessing the pharmacokinetic properties of drugs.

3. Protein quantification studies:

MRM can be used for the quantitative analysis of proteins, such as quantifying drug target proteins to understand the interaction between drugs and target proteins.

5. What are the experimental steps of MRM?

1. Select precursor and product ion pairs:

Choose appropriate precursor and product ion pairs based on the mass-to-charge ratio and fragmentation pattern of the target molecule.

2. Optimize collision energy:

Adjust the collision energy to maximize the abundance of product ions from precursor ions.

3. Determine quantitative ion pairs:

Select appropriate precursor and product ion pairs for quantitative analysis.

4. Establish a standard curve:

Prepare a series of standards with known concentrations to establish a standard curve for quantifying target molecules.

5. Sample preparation and analysis:

Choose appropriate sample preparation methods, such as extraction and purification, based on the sample characteristics, then perform mass spectrometry analysis.

Biotech company Betapeptide--Characterization of biopharmaceuticals, high-quality multi-group mass spectrometry detection service provider

Related services:

MRM quantitative protein analysis

Parallel Reaction Monitoring (PRM) services

DIA-PRM Proteomics

Absolute Quantification Analysis (AQUA)

Targeted Proteomics

Quantitative Proteomics Analysis

4D Proteomics

Post-translational Modification Proteomics Analysis

Label-Free Quantitative Proteomics Analysis

Tag-based Protein Quantification Techniques - iTRAQ, TMT, SILAC