Analytical Instrument Documents

The Kendrick Mass Defect (KMD) method has made it possible to easily visualize polymer series contained in complex high mass-resolution mass spectra. Here, we introduce examples of analyzing a mixture of two types of binary polyesters and a quaternary polyester.

Thermal Desorption (TD) is a pretreatment device that heats the sample tube and introduces the desorbed gas into the GC. The gas desorbed from the sample tube is trapped in a cooled focusing trap and then desorbed by rapid heating of the focusing trap. The two-stage thermal desorption system provides high analytical sensitivity. These methods are used in a wide range of fields such as food, fibers, plastics and wood products because of their ability to collect volatile compounds efficiently (MSTips No. 435, 436, 459). In this report we show the useful results of the analysis of food aroma compounds using this method.

We report the results of the analysis of optional aromatic components from the volatile organic compounds of hamburger using this method.

We report the results of analyzing optional polymer additives from the pyrolysis measurement data of polyvinyl chloride (PVC) using this method.

DEP is a technique in which a sample is applied directly to the platinum filament at the tip of the probe and the sample is rapidly heated by passing an electric current through the filament. This makes it possible to rapidly ionize the sample while minimizing thermal decomposition. Therefore, sample pretreatment is almost unnecessary, and it is suitable for the analysis of non-volatile substances or substances that are easily thermally decomposed. In this study, we attempted rapid qualitative analysis of the organic pigments contained in toner using DEP.

In this report, we examined a case study of pesticide analysis using the LPGC-MS method with nitrogen carrier gas in the JMS-Q1600GC.

In this application note, we report the measurement result of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) in fly ash sample by using a gas chromatograph triple quadrupole mass spectrometer JMS-TQ4000GC (Figure 1). In addition, the obtained measurement results were compared with those of GC/HRMS JMS-800D.

In this application note, we report the identification of structural isomers of ASS, SSA and SAS observed from the pyrolysis of ABS resin using product ion scan measurement with the GC triple quadrupole mass spectrometer JMS-TQ4000GC (Figure 1).

In this report, we performed an end-group analysis of polymer samples with a high polydispersity and molecular weight of less than 50,000 by combining SEC and high-performance MALDI-TOFMS. In particular, we report on (i) improvement of the efficiency of fractionation by SEC and pretreatment for MALDI-TOFMS measurement, (ii) improvement of visualization of end group changes in mass spectra of SEC fractionated samples with reduced polydispersity, (iii) End group analysis in the high molecular weight region (molecular weight 10,000 to 20,000).

This report introduces an example of analysis using Nitrogen carrier gas for the simultaneous analysis of pesticide residues in food by GC-MS/MS method.