Chromatograph Mass Spectrometer×一般財団法人材料科学技術振興財団 MST - List of Manufacturers, Suppliers, Companies and Products

[Analysis Case] Analysis of Odorous Components in Olive Oil

Identification of odor components causing differences in products through GC/MS comparison.

When an unusual odor arises from food, it is important to identify the components that cause it. In foods containing various odor components, trace elements can significantly contribute to the overall smell, and the balance of component quantities can lead to substantial differences in odor. Therefore, it is necessary to narrow down the candidate components by comparing the odorous product with a normal product. Here, we present a case study that compares new olive oil and old olive oil using GC/MS to analyze the odor components responsible for the unusual smell.

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[Analysis Case] High-Sensitivity Analysis of Nitrogen Compounds by GC

Analysis of nitrogen compounds using GC/MS/NPD (Nitrogen Phosphorus Detector).

When analyzing samples containing nitrogen compounds using GC, simultaneous measurement with MS (mass spectrometer) and NPD (nitrogen-phosphorus detector) allows for the detection of components that do not appear as peaks in the MS, enabling the acquisition of MS spectra from their retention times for qualitative analysis. In this case, a sample containing trace amounts of the nitrogen-containing compound trimethylamine was measured using GC/MS/NPD. A peak that was buried in the baseline in the MS was confirmed by the NPD, allowing for the qualitative identification of trimethylamine from the mass spectrum at the same retention time.

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[Analysis Case] Analysis of the Concentration of Functional Ingredients in Blood Components

Case study on the evaluation of resveratrol concentration in blood.

Measurement method: LC/MS Product field: Food and pharmaceuticals Analysis purpose: Composition evaluation and identification

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Analysis of evolved gases and identification of polymer materials using GC/MS.

Principles and Applications of Pyrolysis GC/MS

Pyrolysis GC/MS is a gas chromatography-mass spectrometer equipped with a pyrolysis device in the sample introduction section. For polymer materials that previously required complex pretreatment, samples can now be introduced into the GC for analysis without pretreatment by heating and decomposing them with the pyrolysis device. Additionally, by varying the temperature conditions of the pyrolysis device and the sampling conditions (double-shot method), it is possible to obtain two different types of information, such as additives and polymer materials, separately from the same sample, making the analysis of unknown polymer materials easier.

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[Analysis Case] Quantitative Analysis of Acrylamide in Food

Participating in the FAPAS proficiency test ensures the accuracy of analytical values.

In 2002, it was announced that acrylamide, which may have carcinogenic properties, is generated when foods high in carbohydrates are heated at temperatures above 120°C (Figure 1), attracting attention. According to the Ministry of Agriculture, Forestry and Fisheries (MAFF) website, acrylamide is found in many foods, including fried potato snacks, toast, and coffee. At MST, we participate in the proficiency testing FAPAS and confirm that the absolute value of the z-score is 2 or below (satisfactory), allowing us to accurately quantify acrylamide in food using LC/MS/MS.

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[Analysis Case] Component Analysis of Tears and Saliva

Quantitative analysis is possible with body fluids other than blood and urine.

To understand the pharmacokinetics of drugs, it is important to know the concentration of drugs in body fluids. While blood is generally used for quantitative analysis of drugs absorbed into the body, recent years have seen a growing interest in the analysis of body fluids such as tears and saliva, which are less burdensome to collect than blood. At MST, it is possible to quantitatively analyze components contained in not only blood and urine but also tears and saliva with high sensitivity using LC/MS/MS. Below are examples of glucose analysis in tears and 5-fluorouracil analysis in saliva.

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[Analysis Case] Quantification of Diacetyl in Beverages

The amount of diacetyl can be evaluated by GC/MS.

Diacetyl, which has a buttery smell, is known as an off-flavor (off-odor) in beverages and significantly affects the flavor of products. In particular, in the brewing industry, even minor differences in concentration at the ppb level can influence the aroma of the product, making it useful to sensitively quantify diacetyl concentration for quality assessment and product development. This document presents a case where trace amounts of diacetyl in beverages, which could not be evaluated by standard GC/MS measurements, were quantifiable through derivatization treatment.

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[Analysis Case] Investigation of the Causes of Yellowing in Polyurethane

By using PDA and MS in LC, it is possible to qualitatively analyze colored extracts.

Many organic materials (resins) may discolor due to aging and other factors. The causes include the formation of conjugated double bonds within the polymer, the degradation of additives contained in the resin, and the transfer of surrounding substances, among others. When the degradation of additives is the cause, the responsible substances can be analyzed by elution using methods such as LC or GC. Here, we provide an overview of the causes of resin discoloration and analysis methods, and introduce a case where the coloring substances responsible for yellowing in polyurethane were separated by LC and qualitatively identified using a combination of PDA and MS.

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Analysis of odor components using GCMS analysis method.

It is an analytical method for separating and qualitatively and quantitatively analyzing optical isomers and cis-trans isomers.

The analysis of odor components is effective for evaluating the scent that characterizes a product and for identifying the causes of unpleasant odors. Many odor components exist as stereoisomers, and isomers can have completely different scents from each other. When distinguishing and analyzing stereoisomers, methods such as NMR may be used; however, this case will introduce an example using GC/MS. Chromatography allows for the clear separation and evaluation of target components from other components. Additionally, by using columns designed for isomer separation, it is possible to evaluate various stereoisomers that cannot be separated using general-purpose columns. Measurement method: GC/MS Product fields: Cosmetics, daily necessities, food, environment Analysis objectives: Composition evaluation, identification, product investigation For more details, please download the materials or contact us.

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[Analysis Case] Identification and Quantitative Evaluation of Solvents and Additives in LIB Electrolytes

Qualitative and quantitative evaluation is possible from the sampling of the electrolyte.

The electrolyte of lithium-ion secondary batteries can be qualitatively and quantitatively analyzed using GC/MS. In the example below, ethylene carbonate (EC) and ethyl methyl carbonate (EMC) were identified as organic solvents, and vinylene carbonate (VC) was identified as an additive. It is also possible to determine the composition ratio of the solvents and the content of the additives. Additionally, other additives such as fluoroethylene carbonate (FEC) and ethylene sulfite (ES) can also be evaluated.

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[Analysis Case] Composition Analysis of UV Curing Resin

The identification capability is enhanced when combined with soft ionization methods.

UV-curable resins harden quickly when exposed to ultraviolet light and are widely used as coating materials and adhesives due to their ease of use. In acrylate resins, which are commonly used materials, the molecular ions of acrylate monomers are difficult to detect using the conventional ionization method of EI in GC/MS analysis, leading to insufficient structural estimation. Here, we introduce a case where, in addition to the partial structural information obtained from the conventional EI method, the use of the soft ionization method FI enabled the detection of molecular ions, allowing for the estimation of the structure of acrylate monomers.

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Chromatograph Mass Spectrometer×一般財団法人材料科学技術振興財団 MST - List of Manufacturers, Suppliers, Companies and Products

Chromatograph Mass Spectrometer Product List

Chromatograph Mass Spectrometer×一般財団法人材料科学技術振興財団　MST - List of Manufacturers, Suppliers, Companies and Products