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Khalid N, Sammi S, Miskeen S, Khan I, Inam-u-llah, Liaquat M, Anwar K, Khan A, Shah AM, Shah AS, Al-Judaibi AAM, Ha JW, Jahangir M. Impact of salicylic acid and calcium chloride on quality attributes of peach stored at refrigeration temperature. Food Sci Biotechnol 2023; 32:1281-1296. [PMID: 37362809 PMCID: PMC10289965 DOI: 10.1007/s10068-023-01261-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 01/05/2023] [Accepted: 01/16/2023] [Indexed: 02/16/2023] Open
Abstract
Salicylic acid (SA) in different concentration were used to assess its individual effect as well as combined impact with 3% calcium chloride (CaCl2) on Swat No. 8 variety of peach stored at refrigerated temperature (6 ± 2 °C) for 21 days. Interestingly, the results revealed that applying 2 mmol L-1 SA with 3% CaCl2 maintained maximum nutritional value and least decay percent (44.1%) as compared to other treatments during storage. Moreover, this combination also exhibited significant weight loss and chilling injury at 6 ± 2 °C whereas increased levels of total phenolic, flavonoids, tannin, alkaloid, ascorbic acid, and antioxidant activity were observed as compared to other treatments. The combination treatment (2 mmol L-1 SA with 3% CaCl2) maintained other sensory attributes of peach fruit during refrigerated storage, therefore, its commercial use was recommended to store peach fruit for up to three weeks without any significant nutritional and physical loss.
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Affiliation(s)
- Nosheen Khalid
- Department of Food Science and Technology, The University of Haripur, Haripur, Pakistan
| | - Shehla Sammi
- Department of Food Science and Technology, The University of Haripur, Haripur, Pakistan
| | - Sumaira Miskeen
- Department of Food Science and Technology, The University of Haripur, Haripur, Pakistan
| | - Imran Khan
- Department of Food Science and Technology, The University of Haripur, Haripur, Pakistan
| | - Inam-u-llah
- Department of Food Science and Technology, The University of Haripur, Haripur, Pakistan
| | - Muhammad Liaquat
- Department of Food Science and Technology, The University of Haripur, Haripur, Pakistan
| | - Khurshid Anwar
- Department of Food Science and Technology, The University of Haripur, Haripur, Pakistan
| | - Adnan Khan
- Department of Food Science and Technology, The University of Haripur, Haripur, Pakistan
- Kyber-Pakhtunkhwa Food Safety and Halal Food Authority, Peshawar, Pakistan
| | - Abdul Majeed Shah
- Department of Food Science and Technology, The University of Haripur, Haripur, Pakistan
| | - Abdul Sattar Shah
- Kyber-Pakhtunkhwa Food Safety and Halal Food Authority, Peshawar, Pakistan
- Department of Agricultural Sciences, University of Swabi, Swabi, Pakistan
| | | | - Jae-Won Ha
- Department of Food Science & Biotechnology, Global K-Food Research Center, Hankyong National University, Anseong-Si, South Korea
| | - Muhammad Jahangir
- Department of Food Science and Technology, The University of Haripur, Haripur, Pakistan
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Kumar S, Maji S, Sundararajan K. Method to Eliminate Fluoride Interference in the Spectrophotometric Estimation of Zirconium: Application to U-Zr Alloys. APPLIED SPECTROSCOPY 2022; 76:635-643. [PMID: 35188410 DOI: 10.1177/00037028221085318] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In the estimation of Zr using the ultraviolet-visible (UV-Vis) spectrophotometric technique, fluoride interference is a decade-old unsolved problem. The process of repeated fuming with strong acids is often used to remove fluoride from the solution in order to estimate Zr using spectrophotometry analysis. For the first time, in this work, a simple use of AlCl3 is reported as a suppressing reagent to eliminate the interference of fluoride in the estimation of Zr. Xylenol orange in HCl medium is used as a complexing reagent. Linearity in the datum acquired from absorbance at 551 nm (λmax) is achieved over the concentration range 0.25-4.5 µg mL-1 of Zr with a molar absorptivity of 35<thinsp>030 L·mol-1·cm-1 and Sandell's sensitivity of 0.003 µg·cm-2. Zr is quantified in the variety of U-Zr alloys and various water samples using spectrophotometric detection with a classical univariate calibration with suppressing of fluoride interference through AlCl3. Results from this novel analytical method herein developed for the first time are compared with those achieved from gravimetric analysis.
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Affiliation(s)
- Satendra Kumar
- Materials Chemistry and Metal Fuel Cycle Group, 29937Indira Gandhi Centre for Atomic Research, Kalpakkam, India
- Homi Bhabha National Institute, Mumbai, India
| | - Siuli Maji
- Materials Chemistry and Metal Fuel Cycle Group, 29937Indira Gandhi Centre for Atomic Research, Kalpakkam, India
| | - Kalyansundaram Sundararajan
- Materials Chemistry and Metal Fuel Cycle Group, 29937Indira Gandhi Centre for Atomic Research, Kalpakkam, India
- Homi Bhabha National Institute, Mumbai, India
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Spectroscopic Determination of Fluoride Using Eriochrome Black T (EBT) as a Spectrophotometric Reagent from Groundwater. Int J Anal Chem 2022; 2021:2045491. [PMID: 34992659 PMCID: PMC8727133 DOI: 10.1155/2021/2045491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Revised: 11/29/2021] [Accepted: 12/10/2021] [Indexed: 11/18/2022] Open
Abstract
Fluoride health problem is a great concern worldwide, most often as a result of groundwater intake. Thus, determination of fluoride is vital to take appropriate measures upon fluoride contamination of water. Potentiometric method of analysis is reliable for the determination of fluoride in various samples. In addition, spectroscopic methods are found important to quantify fluoride levels from water; however, several factors hinder its easier determination. Among the bottlenecks, the use of toxic chemicals and tedious steps in preparing chemicals (e.g., SPADNS method) are to mention a few. In this study, a spectrophotometric method was developed for the determination of fluoride from groundwater using Eriochrome Black T (EBT) as a spectroscopic reagent. Experimental parameters that influence the determination of fluoride including ligand type, kinetics, pH, and ligand-to-metal ratio were assayed. Evaluation of fluoride levels showed that Beer–Lambert's law is obeyed in the range of 0.3–5.0 mg/L at 544 nm. The calibration curve, resulting in good linearity (R2 = 0.9997), was considered during quantitative analysis of the samples and in the spiking analysis. The limits of detection (LOD) and quantification (LOQ) of the method were found to be 0.19 and 0.64 mg/L, respectively. The precision studied in terms of intraday and interday at three concentration levels showed less than 5.4% RSD. Applicability of the method was investigated by analyzing groundwater samples spiked with fluoride standards, and satisfactory recoveries in the range of 98.18–111.4 were demonstrated. The developed spectrophotometric method has been successfully applied for fluoride determinations in groundwater samples. Thus, it could be used as an attractive alternative for the determination of fluoride from groundwater.
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Qin Y, Faheem A, Hu Y. A spore-based portable kit for on-site detection of fluoride ions. JOURNAL OF HAZARDOUS MATERIALS 2021; 419:126467. [PMID: 34182423 DOI: 10.1016/j.jhazmat.2021.126467] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 06/16/2021] [Accepted: 06/21/2021] [Indexed: 06/13/2023]
Abstract
The excess residues of fluoride ions cause serious human health problems, making their detection highly valuable. In this work, a whole-cell-based biosensor was presented for the detection of fluoride ions, which can inhibit the color reaction of 3,3',5,5',-tetramethylbenzidine (TMB) catalyzed by the CotA-laccase of spore surface. This reaction for the detection of fluoride ions could be read out through UV-vis spectrophotometer, smartphone, or standard colorimetric card within 10 min. Under optimum conditions, a linear range of 1-600 μmol L-1 with a detection limit of 0.12 μmol L-1 (3σ/k) was achieved for fluoride ions detection by using UV-vis spectrophotometer. The biosensor coupling with smartphone had a good linear response to fluoride ions concentration in the range of 5-600 μmol L-1 with LOD of 0.90 μmol L-1 (3σ/k). The standard colorimetric card can be directly used for recognizing the fluoride ions level via naked-eyes. A portable kit based on a colorimetric card and smartphone was developed and has been successfully applied for fluoride ions monitoring in surface waters and groundwater. This developed method has several advantages such as rapid, outstanding selectivity and anti-interference, low-cost, ease of operation and storage, and eco-friendliness, meeting the demands of point-of-care testing of fluoride ions and disease prevention.
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Affiliation(s)
- Yuqing Qin
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Aroosha Faheem
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yonggang Hu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
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