Stabilizing NaCl particles with Cd2+ in a saturated solution during ex situ PSD measurement

Choi, Byung Sang; Ring, Terry A.

doi:10.1016/j.jcrysgro.2004.05.084

Cited by 6 publications

(4 citation statements)

References 13 publications

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“…Here, the latter may relate to a whole series of phenomena such as particle (a) dispersion, (b) agglomeration, (c) segregation, (d) attrition, and (e) dissolution [45]. So, if ever one would like to make a conclusion regarding the performance of LD in the size distribution analysis of nonspherical particles, at least one should be able to identify the individual contributions of all the above mentioned factors.…”

Section: Introductionmentioning

confidence: 99%

Particle shape and orientation in laser diffraction and static image analysis size distribution analysis of micrometer sized rectangular particles

Tinke¹,

Carnicer

Govoreanu³

et al. 2008

Powder Technology

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A systematic study has been described on the laser diffraction (LD) and static image analysis (SIA) of rectangular particles [1]. To rule out powder sampling, sample dispersion and particle orientation as a possible root cause for differences in size distribution profile, powder samples were initially immobilized by means of a dry disperser onto a glass plate. For a defined region of the glass plate the diffraction pattern as induced by the dispersed particles, and the 2D dimensions of the individual particles were measured by LD and optical microscopy, respectively. Correlation between LD and SIA could be demonstrated considering the scattering intensity of the individual particles as the most dominating factor. For both spherical and rectangular particles, theory explains the latter to relate to the square of their projected area. In traditional LD, the size distribution profile is dominated by the maximum projected area of the particles (A), and the diffraction diameters of a rectangular particle with length L and breadth B are perceived by the LD instrument to correspond by approximation with spheres having a diameter of ∅ L and ∅ B , respectively. Weighting for differences in scattering intensity between spherical and Page 3 of 56 rectangular particles exlains each rectangular particle to contribute to the overall LD volume probability distribution proportional to A 2 /L and A 2 /B. Accordingly, for rectangular particles this scattering intensity weighted diffraction diameter (SIWDD) concept explains an overestimation of their shortest dimension and an underestimation of their longest dimension. For this study various samples have been analysed with the longest dimension of the particles ranging from ca. 10 to 1000 µm. For a variety of pharmaceutical powders all with a different rectangular particle size and shape, the demonstrated correlation between LD and SIA aims to facilitate the user in a better validation of LD methods based on SIA data.

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Section: Introductionmentioning

confidence: 99%

Particle shape and orientation in laser diffraction and static image analysis size distribution analysis of micrometer sized rectangular particles

Tinke¹,

Carnicer

Govoreanu³

et al. 2008

Powder Technology

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“…The particle size distribution was revealed following the method reported by Choi and Ring (2004) with some modifications. Briefly, a pearl powder sample (< 50 mg/L) was added to a beaker of distilled water, and then dispersed by ultrasonic for 20 min.…”

Section: Methodsmentioning

confidence: 99%

Calcium Bioavailability of Nanonized Pearl Powder for Adults

Chen¹,

Chang²,

Wu³

2008

Journal of Food Science

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The present study was aimed to evaluate the calcium bioavailability of pearl powder for humans. Both the nanonized pearl powder (NPP) and the micronized pearl powder (MPP) prepared by a dry grinder were tested. A group of healthy adults free from hyperthyroidism, hypercalcemia, and hypocalcemia were recruited as the subjects for oral administration with the pearl powder. The bioavailability was evaluated by the serum total calcium increment, the serum intact parathyroid hormone (iPTH) reduction, and the urine calcium/creatinine ratio increment in 6 h after administration. The results show better absorption and retention of calcium from NPP, as reflected with the shorter time elapsed before the maximum concentration of calcium appeared in the serum, higher iPTH reduction, more calcium absorption, and higher maximum calcium concentration (C(max)) in serum after ingestion, than that from MPP. We conclude that pearl powder is a beneficial source of calcium for adults and that nanonization improves its calcium bioavailability.

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“…On the other hand, the introduction of impurities characteristically contain functional groups that bear strong structural and chemically resemblance to the host crystalline phase can result in strong surface adsorption, high levels of incorporation, and change growth rate, Cd 2+ and Ca 2+ are known to absorb on the NaCl crystal surface because their ionic radius are within 5% of that of sodium [15]. Hence, the introduction of Ca 2+ may also change growth rate of Na 2 SO 4 on some given faces to form an environment-friendly water-dissolvable template materials.…”

Section: Introductionmentioning

confidence: 99%

Large-Scale Synthesis of Water-Dissoluble Nanorods

Wang

Xue

et al. 2014

AMR

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Highly water-dissolvable Na2SO4 nanorods were prepared by introducing Ca2+ and NO3- as shape-control agents. The diameter of the as-synthesized nanorods was basically in the range of 20-40 nm, and the length was in the range of 500-800 nm. It was also found that Ca2+ can restrict the growth of the nanocrystals on a given face and the NO3- can also selectively adsorb on a given face and favor the growth of the nanocrystals and the Cl- may help to form uniform nanorods. The synthesis procedure was also simple, and the as-synthesized nanorods may provide ideal templates for preparing nanotubular materials.

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Stabilizing NaCl particles with Cd2+ in a saturated solution during ex situ PSD measurement

Cited by 6 publications

References 13 publications

Particle shape and orientation in laser diffraction and static image analysis size distribution analysis of micrometer sized rectangular particles

Particle shape and orientation in laser diffraction and static image analysis size distribution analysis of micrometer sized rectangular particles

Calcium Bioavailability of Nanonized Pearl Powder for Adults

Large-Scale Synthesis of Water-Dissoluble Nanorods

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