Purge-assisted solid phase microextraction based on activated carbon as a new technique for determination of odorous compounds in drinking water samples

Rasoulipanah, Halaleh; Mohammadiazar, Sirwan; Zeeb, Mohsen; Nazari, Ali Ashghar

doi:10.1016/j.microc.2023.108945

Cited by 6 publications

(1 citation statement)

References 24 publications

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“…The gas pressure was 34 psi, and the ow rate was 1 mL.min − 1 . The components were identi ed by comparing their mass spectra with the information available in device databases such as NIST08 and Willey7n.1, also comparing the inhibition indicators and the fracture pattern documented for them (Rasoulipanah et al 2023).…”

Section: Gc-ms Analysesmentioning

confidence: 99%

Melatonin application in in vitro conditions may modulate the phyto-biochemical mechanisms of Hymenocrater longiflorus Benth. under salinity stress

Manafi,

Mozafari,

Ghoran

2024

Preprint

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Hymenocrater longiflorus Benth. (Surahalala) is an aromatic perennial plant species rich in secondary metabolites. It exhibits pharmaceutical effects due to essential oils and terpenoid compounds. This study investigated the effects of different NaCl concentrations (0, 50, 100 mM), as salt stress, and melatonin levels (0, 5, 15, 25 µM) on the physiological and phyto-biochemical traits of H. longiflorus under in vitro cultivation. The results showed that the growth parameters, i.e. fresh weight, shoot length, chlorophyll, carotenoids, and relative water content, were maximized by applying 5 µM melatonin. High salinity (50 and 100 mM) caused a significant increase in malondialdehyde and hydrogen peroxide levels, while melatonin treatment reduced the negative effects of salinity and oxidative damage in H. longiflorus. Total phenol content, phenylalanine ammonia-lyase enzyme activity, and antioxidant activity increased upon applying NaCl and melatonin treatments. Under salt stress conditions, certain terpenes (i.e., d-limonene, α-thujene, and γ-terpinene) increased, while others, like α-pinene, copaene, and terpinen-4-ol, decreased. Notably, the application of melatonin at higher concentrations (5 to 25 µM) resulted in elevated essential oil contents, including terpinen-4-ol, eremophila ketone, and copaene. However, 15 µM melatonin and 100 mM NaCl combined achieved the highest levels of d-limonene, α-thujene, and γ-terpinene. Our findings highlighted melatonin’s potential to modulate plant growth and improve the biosynthesis of essential oils and terpenoids in H. longiflorus, subjected to salt stress under in vitro cultivation. This research suggests promising strategies to increase the active phytochemicals of H. longiflorus to enhance its pharmacological benefits and the development of natural products.

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Section: Gc-ms Analysesmentioning

confidence: 99%

Melatonin application in in vitro conditions may modulate the phyto-biochemical mechanisms of Hymenocrater longiflorus Benth. under salinity stress

Manafi,

Mozafari,

Ghoran

2024

Preprint

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Bubble‐Assisted Sample Preparation Techniques for Mass Spectrometry

Elpa,

Urban

2024

Mass Spectrometry Reviews

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This review delves into the efficacy of utilizing bubbles to extract analytes into the gas phase, offering a faster and greener alternative to traditional sample preparation methods for mass spectrometry. Generating numerous bubbles in liquids rapidly transfers volatile and surface‐active species to the gas phase. Recently, effervescence has found application in chemical laboratories for swiftly extracting volatile organic compounds, facilitating instantaneous analysis. In the so‐called fizzy extraction, liquid matrices are pressurized with gas and then subjected to sudden decompression to induce effervescence. Alternatively, specifically designed effervescent tablets are introduced into the liquid samples. In situ bubble generation has also enhanced dispersion of extractant in microextraction techniques. Furthermore, droplets from bursting bubbles are collected to analyze non‐volatile species. Various methods exist to induce bubbling for sample preparation. The polydispersity of generated bubbles and the limited control of bubble size pose critical challenges in the stability of the bubble–liquid interface and the ability to quantify analytes using bubble‐based sample preparation techniques. This review covers different bubble‐assisted sample preparation methods and gives practical guidance on their implementation in mass spectrometry workflows. Traditional, offline, and online approaches for sample preparation relying on bubbles are discussed. Unconventional bubbling techniques for sample preparation are also covered.

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Melatonin application in in vitro conditions may modulate the phyto-biochemical mechanisms of Hymenocrater longiflorus Benth. Under salinity stress

Manafi,

Mozafari,

Ghoran

2024

Plant Growth Regul

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Purge-assisted solid phase microextraction based on activated carbon as a new technique for determination of odorous compounds in drinking water samples

Cited by 6 publications

References 24 publications

Melatonin application in in vitro conditions may modulate the phyto-biochemical mechanisms of Hymenocrater longiflorus Benth. under salinity stress

Melatonin application in in vitro conditions may modulate the phyto-biochemical mechanisms of Hymenocrater longiflorus Benth. under salinity stress

Bubble‐Assisted Sample Preparation Techniques for Mass Spectrometry

Melatonin application in in vitro conditions may modulate the phyto-biochemical mechanisms of Hymenocrater longiflorus Benth. Under salinity stress

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