Tag: M.W=250-300

Xue, Yu; Vughs, Dennis; Hater, Wolfgang; Huiting, Hans; Vanoppen, Marjolein; Cornelissen, Emile; Verliefde, Arne; Brunner, Andrea M. published the artcile< Liquid chromatography-high-resolution mass spectrometry-based target and nontarget screening methods to characterize film-forming amine-treated steam-water systems>, Product Details of C17H37NO2, the main research area is liquid chromatog high resolution mass spectrometry target nontarget screening; screening film forming amine treated steam water systems.

Film-forming amine products (FFAP) are frequently used as corrosion inhibitors in steam-water systems. To have a better understanding of their behavior in the treated system, a liquid chromatog. coupled to the high-resolution mass spectrometry (LC-HRMS) method was developed. This method enabled the concurrent targeted quant. anal. of the film-forming amine oleyl propylenediamine (OLDA) and the nontarget screening (NTS)-based anal. of potential degradation products of FFAP or other organic matter in the system. The method was applied to samples collected from an FFAP-treated industrial steam-water system. OLDA was detected at a concentration of 0.027 mg/L after the FFAP dosing in the low-pressure steam drum. A feature (a combination of mass-to-charge ratio and retention time associated with a signal intensity) prioritization workflow was designed and applied to the NTS results to focus on the potential thermal degradation products of FFAP that could affect the studied steam-water system. Six features were prioritized from a total of 4596 detected features. Structural elucidation of these features was attempted based on mass spectrometry fragmentation data. One of the prioritized features was successfully identified as 2,2′-(tridecylimino)diethanol, presumably a degradation product of the FFAP emulsifier. Because of the chem. structure of the mol., 2,2′-(tridecylimino)diethanol was considered as noncorrosive to the system. Overall, the developed LC-HRMS method facilitated the efficient anal. of OLDA with a limit of quantification of 0.002 mg/L and a comprehensive monitoring of organic matter across the steam-water system, including potential degradation products of the dosed FFAP.

Industrial & Engineering Chemistry Research published new progress about Boiler waters. 18312-57-7 belongs to class ethers-buliding-blocks, and the molecular formula is C17H37NO2, Product Details of C17H37NO2.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Mhlongo, Msizi I.; Piater, Lizelle A.; Dubery, Ian A. published the artcile< Profiling of Volatile Organic Compounds from Four Plant Growth-Promoting Rhizobacteria by SPME-GC-MS: A Metabolomics Study>, Reference of 608141-42-0, the main research area is PGPR volatile organic compound metabolomics profiling SPME GCMS; metabolomics profiling; multivariate data analysis (MVDA); plant growth promoting rhizobacteria (PGPR); solid-phase micro-extraction gas chromatography mass spectrometry (SPME–GC–MS); volatile organic compounds (VOCs).

The rhizosphere microbiome is a major determinant of plant health. Plant-beneficial or plant growth-promoting rhizobacteria (PGPR) influence plant growth, plant development and adaptive responses, such as induced resistance/priming. These new eco-friendly choices have highlighted volatile organic compounds (biogenic VOCs) as a potentially inexpensive, effective and efficient substitute for the use of agrochems. Secreted bacterial VOCs are low mol. weight lipophilic compounds with a low b.p. and high vapor pressures. As such, they can act as short- or long-distance signals in the rhizosphere, affecting competing microorganisms and impacting plant health. In this study, secreted VOCs from four PGPR strains (Pseudomonas koreensis (N19), Ps. fluorescens (N04), Lysinibacillus sphaericus (T19) and Paenibacillus alvei (T22)) were profiled by solid-phase micro-extraction gas chromatog. mass spectrometry (SPME-GC-MS) combined with a multivariate data anal. Metabolomic profiling with chemometric analyses revealed novel data on the composition of the secreted VOC blends of the four PGPR strains. Of the 121 annotated metabolites, most are known as bioactives which are able to affect metabolism in plant hosts. These VOCs belong to the following classes: alcs., aldehydes, ketones, alkanes, alkenes, acids, amines, salicylic acid derivatives, pyrazines, furans, sulfides and terpenoids. The results further demonstrated the presence of species-specific and strain-specific VOCs, characterized by either the absence or presence of specific VOCs in the different strains. These mols. could be further investigated as biomarkers for the classification of an organism as a PGPR and selection for agricultural use.

Metabolites published new progress about Acids Role: ANT (Analyte), PUR (Purification or Recovery), ANST (Analytical Study), PREP (Preparation). 608141-42-0 belongs to class ethers-buliding-blocks, and the molecular formula is C12H19NO4S, Reference of 608141-42-0.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

He, Ying-Jie; Qin, Yan; Zhang, Tie-Li; Zhu, Yan-Yan; Wang, Zhao-Jie; Zhou, Zhong-Shun; Xie, Tian-Zhen; Luo, Xiao-Dong published the artcile< Migration of (non-) intentionally added substances and microplastics from microwavable plastic food containers>, Recommanded Product: 2,2′-(Tridecylazanediyl)diethanol, the main research area is microplastic microwavable toxic plastic food container migration; (Non-) intentionally added substances; High resolution mass spectrometry; Microplastics; Scanning electron microscopy.

Microwavable plastic food containers (MPFCs) are extensively used for food storage, cooking, rapid heating and as take-out containers. There is an urgent need to investigate whether MPFCs pose potential health risks, as a result of the migration of chems. into foods. Herein, 42 intentionally added substances (IAS) and > 100 non-IAS (NIAS) migrating from MPFCs were identified in food simulants according to Regulation (EU). The migration of major IAS and NIAS was higher in 95% ethanol compared to other simulants, and gradually decreased following repeated use. NIAS, including Cramer class III toxic compounds, such as PEG oligomers of N,N-bis(2-hydroxyethyl) alkyl(C8-C18)amines, isomers of hexadecanamide and oleamide, and Irgafos 168 OXO were detected and exceeded the recommended limits in some MPFCs. Furthermore, microplastics (MPs) were detected with high values of over one million particles/L in some MPFCs in a single test, and migration behaviors of MPs in different MPFCs were diverse. Surprisingly, this rigorous migration might result in an annual intake of IAS/NIAS up to 55.15 mg and 150 million MPs particles if take-out food was consumed once a day. Multi-safety evaluation studies on the migration of various chems. from MPFCs to foodstuffs during food preparation should be assessed.

Journal of Hazardous Materials published new progress about Caenorhabditis elegans. 18312-57-7 belongs to class ethers-buliding-blocks, and the molecular formula is C17H37NO2, Recommanded Product: 2,2′-(Tridecylazanediyl)diethanol.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Davidescu, C. M.; Parvulescu, V.; Popa, A.; Burciu, F.; Vass, M.; Luca, C. published the artcile< Effect of polymer-supported onium salts on the phase transfer and catalytic activity of hydrogen peroxide in triphase catalysis>, COA of Formula: C17H37NO2, the main research area is phase transfer polymer supported onium salt; triphase catalysis hydrogen peroxide benzyl alc.

The catalytic effects of quaternary ammonium and/or phosphonium salts grafted on polymer-supports, on the reaction of hydrogen peroxide with benzyl alc. in a triphase system have been studied. A wide variety of catalysts with different quaternary groups and different quaternary chain length substituents were examined The activity of single “”onium”” salts increases as a consequence of the association of ammonium and phosphonium salts grafted on the same polymeric support.

Buletinul Stiintific al Universitatii “Politehnica” din Timisoara Romania, Seria Chimie si Mediului published new progress about Catalysis. 18312-57-7 belongs to class ethers-buliding-blocks, and the molecular formula is C17H37NO2, COA of Formula: C17H37NO2.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

da Silva Oliveira, Wellington; Ubeda, Sara; Nerin, Cristina; Padula, Marisa; Teixeira Godoy, Helena published the artcile< Identification of non-volatile migrants from baby bottles by UPLC-Q-TOF-MS>, Computed Properties of 18312-57-7, the main research area is baby bottle nonvolatile migrant UPLCQ TOF MS; Baby bottles; Migration; Q-TOF; Risk assessment; Silicone; Tritan.

Baby bottles made of polypropylene, Tritan and silicone were evaluated regarding the migration of non-volatile compounds using UPLC-QTOF-MS. Twenty-seven compounds were identified. In all polypropylene samples the migration of 2.2′-(tridecylimino)bis-ethanol and derivatives thereof were detected in concentrations below the specific migration limit (1.2 mg.kg-1). Furthermore, clarifying agents and glycerol derivatives were detected. Tritan baby bottle showed the migration of one slip additive. On the other hand, twenty compounds were detected in silicone baby bottles. Most of them were unknown compounds derived from acrylates. Once the migrants were identified, the risk assessment was carried out using the Threshold of Toxicol. Concern (TTC) approach. The risk assessment of migrants coming from silicone samples showed levels above the threshold recommended as safe for babies.

Food Research International published new progress about Bottles. 18312-57-7 belongs to class ethers-buliding-blocks, and the molecular formula is C17H37NO2, Computed Properties of 18312-57-7.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Otoukesh, Mahdiyeh; Vera, Paula; Wrona, Magdalena; Nerin, Cristina; Es’haghi, Zarrin published the artcile< Migration of dihydroxyalkylamines from polypropylene coffee capsules to Tenax and coffee by salt-assisted liquid-liquid extraction and liquid chromatography-mass spectrometry>, Computed Properties of 18312-57-7, the main research area is dihydroxyalkylamine coffee capsule extraction; Coffee capsules; Dihydroxyalkylamines; LC–MS/MS; Migration to food; Polypropylene; Salting-out.

Migration of N,N-Bis(2-hydroxyethyl) alkyl(C8-C18)amines from five different polypropylene capsules to Tenax and coffee powder have been studied. A single step extraction-cleanup procedure using salting out liquid-liquid extraction (SALLE) method followed by ultra-high performance liquid chromatog.-tandem mass spectrometry (UHPLC-MS/MS) was applied. The critical parameters on the SALLE procedure such as extracting solvent, extracting volume, sample pH, salt and its concentration were optimized. The recovery values were in the range of 87.5%-106.5%. The %RSD were lower than 3.7%. The limit of detection was improved from 2.3 ng/g in Tenax to 0.8 ng/g in coffee. The results indicated that the analyzed compounds have the potential to migrate from the polypropylene capsule containers to the coffee. In most of the cases, the migrated values were higher in Tenax than in coffee in a range between 1.8 and 61%. One sample did not comply with the specific migration limit established by the European Commission.

Food Chemistry published new progress about Capsules. 18312-57-7 belongs to class ethers-buliding-blocks, and the molecular formula is C17H37NO2, Computed Properties of 18312-57-7.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem