2021
DOI: 10.1002/bmc.5096
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Development and validation of LC–MS method for the determination of heptaethylene glycol monomethyl ether in benzonatate bulk drugs

Abstract: A simple and isocratic reverse-phase liquid chromatography with mass spectrometric method has been developed and validated for the determination of heptaethylene glycol monomethyl ether in benzonatate drug substance. Benzonatate is an oral antitussive drug used to relieve and suppress cough in patients older than 10 years.The presence of residual heptaethylene glycol monomethyl ether in the benzonatate drug substance affects the safety, strength, purity and quality of the drug substance.The subject compound se… Show more

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Cited by 14 publications
(10 citation statements)
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“…The main aim while developing a new chromatography method was to develop a single method for separation of enantiomers of rivaroxaban (Impurity‐C) along with Impurity‐A, Impurity‐B, Impurity‐D, Impurity‐E and degradants from rivaroxaban. To achieve the separation of non‐chiral impurities and chiral impurity together from rivaroxaban, a chiral stationary phase was chosen as the first choice (Durga rao, Kalyanraman, et al, 2010; Katakam, Ettaboina, & Dongala, 2021; Katakam, Ettaboina, & Marisetti, 2021). Initially the separation was tried in the normal phase with various chiral columns, namely, Chiral Pak AD‐H, Chiralcel OJ‐H, Chiralcel OD‐H, Chiral Pak‐IB, and Chiral Pak‐IA, and the mobile phase with different ratios of n ‐hexane, methanol, dichloromethane, and 2‐propanol was used.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…The main aim while developing a new chromatography method was to develop a single method for separation of enantiomers of rivaroxaban (Impurity‐C) along with Impurity‐A, Impurity‐B, Impurity‐D, Impurity‐E and degradants from rivaroxaban. To achieve the separation of non‐chiral impurities and chiral impurity together from rivaroxaban, a chiral stationary phase was chosen as the first choice (Durga rao, Kalyanraman, et al, 2010; Katakam, Ettaboina, & Dongala, 2021; Katakam, Ettaboina, & Marisetti, 2021). Initially the separation was tried in the normal phase with various chiral columns, namely, Chiral Pak AD‐H, Chiralcel OJ‐H, Chiralcel OD‐H, Chiral Pak‐IB, and Chiral Pak‐IA, and the mobile phase with different ratios of n ‐hexane, methanol, dichloromethane, and 2‐propanol was used.…”
Section: Resultsmentioning
confidence: 99%
“…Durga rao, Kalyanraman, et al, 2010;Katakam, Ettaboina, & Marisetti, 2021). Initially the separation was tried in the normal phase with various chiral columns, namely, Chiral Pak AD-H, Chiralcel OJ-H, Chiralcel OD-H, Chiral Pak-IB, and Chiral Pak-IA, and the mobile phase with different ratios of n-hexane, methanol, dichloromethane, and 2-propanol was used.…”
mentioning
confidence: 99%
“…[24] The fire program is sophisticated Single, with sensors Powerful UAV When used, in Europe Another venture Internal show and infrared Low charge with cameras Uses UAVs .In this undertaking, UAVs are closer Provides images and facts Act as neighborhood sensors ,UAVs shooting program Sophisticated sensors Uses single, powerful UAV with, In Europe at the equal time Another challenge is the inner show And low with infrared Price makes use of UAVs. Cameras In this project, UAVs Close-up pics and As local sensors that provide As nearby sensors that provide Traditionally ,Surveillance by using UAVs by the military And are used for espionage operations .However, sturdy Wi-Fi networking With the arrival of generation [25]Monitoring the unfold of large wildfires /Tracking. Six degrees Dynamic UAV with independence Using the sample, no Distribution version wildfire Monitoring and detection Verified Existing literature and the aforementioned of research Based at the evaluation, Many in the literature Methods are deliberate Multiple sensor integration And assorted Of facts structure Under integration.…”
Section: Surveillancementioning
confidence: 99%
“…These biodiesel fuels are usually residues of rapeseed, soybean, saffron, peanut, sunflower, coconut, cotton seed or other vegetable oils. In Germany, the most common biodiesel is rapeseed oil methyl ester, while in the United States it is mainly soy methyl ester [38]. Biodiesel generally emits up to 60% less CO and 80% NOx, and the overall increase in biodiesel emissions is due to emissions of benzene and aldehydes with biodiesel fuels.…”
Section: Biodieselmentioning
confidence: 99%