Direct potentiometric determination of starch using a platinum redox sensor

Sakač, Nikola; Sak-Bosnar, Milan; Horvat, Marija

doi:10.1016/j.foodchem.2012.10.044

Cited by 6 publications

(4 citation statements)

References 19 publications

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“…6,19307 and 100000. To gain information from the content of our carbohydrates with their possible contaminants and remainders of the production process, the two most concentrated solutions were subjected to standard spectrophotometric absorbance tests.…”

Section: Methodsmentioning

confidence: 99%

“…The determination of the concentration of a starch solution is an inevitable stage in the food processing and print paper industries, where starch continues to be a central material for production [4][5][6]. Polarimetry, reduction reaction and colorimetric methods are by far the most available methods for the determination of starch concentration.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dielectric relaxations in starch-water solutions

Yadem

Repo

Silvennoinen

2015

Electrochimica Acta

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dielectric relaxations in starch-water solutions

Yadem

Repo

Silvennoinen

2015

Electrochimica Acta

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“…There are many methods to measure the AAC of rice grains, instrumental methods (e.g., near-infrared reflectance spectroscopy (NIR) [ 16 ] or NIR associated with suitable multivariate regression methods [ 17 , 18 ], the amperometry or potentiometric titration method [ 19 ], high-performance size exclusion chromatography [ 20 ], electrochemical method [ 21 ], the thermo-gravimetric method [ 22 ], the thermal method [ 23 ]), and the conventional iodine staining colorimetric method. The instrumental methods need expensive equipment, and some need tedious modeling steps and have poor sensitivity [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Development of Certified Reference Materials for the Determination of Apparent Amylose Content in Rice

Shao

Zhu

et al. 2022

Molecules

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Apparent amylose content (AAC) is one of the most important parameters in rice quality evaluation. In this study, four rice reference materials used to test rice AAC were developed. The AAC of rice reference materials were measured by a spectrophotometric method with a defatting procedure, calibrated from potato amylose and waxy rice amylopectin at the absorption wavelengths of 620 and 720 nm. Homogeneity test (n = 20) was judged by F-test based on the mean squares of among and within bottles, and short- and long-term stability monitoring was performed by T-test to check if there was significant degradation at the delivery temperature of under 40 °C (14 days) and at 0–4 °C storage condition (18 months), respectively. After joint evaluation by ten laboratories, Dixion and Cochran statistical analyses were presented. The expanded uncertainties were calculated based on the uncertainty of homogeneity, short- and long-term stability, and inter-laboratory validation containing factor k = 2. It found that the four reference materials were homogenous and stable, and had the AAC (g/100 g, k = 2) of 2.96 ± 1.01, 10.68 ± 0.66, 17.18 ± 1.04, and 16.09 ± 1.29, respectively, at 620 nm, and 1.46 ± 0.49, 10.44 ± 0.56, 16.82 ± 0.75, and 24.33 ± 0.52, respectively, at 720 nm. It was indicated that 720 nm was more suitable for the determination of rice AAC with lower uncertainties. The determinations of the AAC of 11 rice varieties were carried out by two methods, the method without defatting and with calibration from the four rice reference materials and the method with a defatting procedure and calibrating from potato amylose and waxy rice amylopectin. It confirmed that the undefatted rice reference materials could achieve satisfactory results to test the rice samples with the AAC ranging from 1 to 25 g/100 g. It would greatly reduce the time cost and improve testing efficiency and applicability, and provide technical support for the high-quality development of the rice industry.

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“…Both the conventional batchwise and continuous flow colorimetric methods require relatively expensive equipment and, therefore, cannot be conducted on site. In addition to the colorimetry, many other instrumental methods have been reported to determine the amylose content, such as electrochemical method, − concanavalin A precipitation method, high performance size exclusion chromatography, , modulated differential scanning calorimetry, near-infrared reflectance (NIR) spectroscopy, , thermogravimetric method, multivariate calibration of the surface plasmon resonance spectra of silver nanoparticles, and so on. Expensive equipment is needed for these methods.…”

Section: Introductionmentioning

confidence: 99%

Determination of Apparent Amylose Content in Rice by Using Paper-Based Microfluidic Chips

Lü

Fang

et al. 2015

J. Agric. Food Chem.

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Determination of apparent amylose content in rice is a key function for rice research and the rice industry. In this paper, a novel approach with paper-based microfluidic chip is reported to determine apparent amylose content in rice. The conventional color reaction between amylose and iodine was employed. Blue color of amylose-iodine complex generated on-chip was converted to gray and measured with Photoshop after the colored chip was scanned. The method for preparation of the paper chip is described. In situ generation of iodine for on-chip color reaction was designed, and factors influencing color reaction were investigated in detail. Elimination of yellow color interference of excess iodine by exploiting color removal function of Photoshop was presented. Under the optimized conditions, apparent amylose content in rice ranging from 1.5 to 26.4% can be determined, and precision was 6.3%. The analytical results obtained with the developed approach were in good agreement with those with the continuous flow analyzer method.

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Direct potentiometric determination of starch using a platinum redox sensor

Cited by 6 publications

References 19 publications

Dielectric relaxations in starch-water solutions

Dielectric relaxations in starch-water solutions

Development of Certified Reference Materials for the Determination of Apparent Amylose Content in Rice

Determination of Apparent Amylose Content in Rice by Using Paper-Based Microfluidic Chips

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