Nucleation studies of potassium hydrogen tartrate in model solutions and wines

Gerbaud, Vincent; Gabas, Nadine; Blouin, Jacques; Laguérie, C.

doi:10.1016/0022-0248(96)00081-4

Cited by 10 publications

(12 citation statements)

References 9 publications

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“…By using the usual expression for acid dissociation equilibria [10], one can predict the molality of TH À as follow. The activity coefficient of non-dissociated TH 2 is set equal to one.…”

Section: Characterization Of Model Solutions and Physico-chemistrymentioning

confidence: 99%

“…In this paper, we study in detail the effect of CMC on KHT crystal in a model solution rather than wine in order to avoid interaction with others wine components like polyphenols and other forms of colloidal materials. Those wine components have been showed to be natural inhibitors of KHT crystallization affecting both nucleation and crystal growth processes [10].…”

mentioning

confidence: 99%

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Effect of carboxymethylcellulose on potassium bitartrate crystallization on model solution and white wine

Bajul

Gerbaud

Teychené

et al. 2017

Journal of Crystal Growth

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Instability in bottled wines refer to tartaric salts crystallization such as potassium bitartrate (KHT). It is not desirable as consumers see the settled salts as an evidence of a poor quality control. In some cases, it causes excessive gushing in sparkling wine. We investigate the effect of two oenological carboxymethylcellulose (CMC) for KHT inhibition in a model solution of white wine by studying the impact of some properties of CMC such as the degree of polymerization, the degree of substitution, and the apparent dissociation constant determined by potentiometric titration. Polyelectrolyte adsorption is used for determining the surface and total charge and for providing information about the availability of CMC charged groups for interacting with KHT crystal faces. The inhibitory efficiency of CMC on model solution is evaluated by measuring the induction time with the help of conductimetric methods. Crystals growth with and without CMC are studied by observation with MEB and by thermal analysis using DSC. The results confirm the effectiveness of CMC as an inhibitor of KHT crystallization in a model solution. The main hypothesis of the mechanism lies in the interaction of dissociated anionic carboxymethyl groups along the cellulose backbone with positively charged layers on KHT faces like the {0 1 0} face. Key factors such as pH, CMC chain length and total charge are discusses.

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“…By using the usual expression for acid dissociation equilibria [10], one can predict the molality of TH À as follow. The activity coefficient of non-dissociated TH 2 is set equal to one.…”

Section: Characterization Of Model Solutions and Physico-chemistrymentioning

confidence: 99%

mentioning

confidence: 99%

Effect of carboxymethylcellulose on potassium bitartrate crystallization on model solution and white wine

Bajul

Gerbaud

Teychené

et al. 2017

Journal of Crystal Growth

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“…The nucleation rate, however, and hence the tind, is strongly dependent on the supersaturation and the interfacial free energy. The tind can be a useful function and has been used to compare the effectiveness of various KHT crystallisation inhibitory compounds (Rodriguez-Clemente and Correa-Gorospe 1988, Gerbaud et al 1996Gerbaud et al , 1997. The tind can be a useful function and has been used to compare the effectiveness of various KHT crystallisation inhibitory compounds (Rodriguez-Clemente and Correa-Gorospe 1988, Gerbaud et al 1996Gerbaud et al , 1997.…”

Section: Coulter Et Al Cold Stability 629mentioning

confidence: 99%

“…Just how strongly tind varies with supersaturation is illustrated in Figure 3 (De Yoreo and Vekilov 2003). The tind can be a useful function and has been used to compare the effectiveness of various KHT crystallisation inhibitory compounds (Rodriguez-Clemente and Correa-Gorospe 1988, Gerbaud et al 1996Gerbaud et al , 1997.…”

Section: Coulter Et Almentioning

confidence: 99%

Potassium bitartrate crystallisation in wine and its inhibition

Coulter

Holdstock

Cowey

et al. 2015

Australian Journal of Grape and Wine Research

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Supersaturation of wine with dissolved tartaric acid is an essential requirement for crystallisation of potassium bitartrate and can be thought of as the driving force. Nucleation must occur, however, before potassium bitartrate crystals can grow and precipitate out of solution. In recent years, wine additives capable of inhibiting potassium bitartrate crystallisation have been commercially available. In this review, the established mechanisms involved in crystallisation are discussed, as they are essential for correctly interpreting the inhibitory effect that wine colloids and additives, such as mannoproteins and carboxymethylcellulose, can have upon potassium bitartrate crystal growth. The wine additive carboxymethylcellulose, in particular, is discussed in detail, as this additive is being trialled increasingly by winemakers since its approval for winemaking.

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“…Due to the complexity of these hydroalcoholic solutions obtained from the fermented grape juice, it is not yet possible to propose a universal preventive treatment for KHT crystallization before bottling. Considerable efforts have been devoted to kinetic studies of KHT nucleation and crystal growth [1][2][3][4][5][6][7][8][9] and different strategies to avoid this phenomenon have been proposed. One of them is the process called ''cold trap'', used in the nuclear industry for the purification of liquid sodium and adapted in the field of enology, which consists in crystallizing KHT on a 316L stainless steel wire grid at a low temperature [10].…”

Section: Introductionmentioning

confidence: 99%

Influence of electrical potential on the crystallization and adhesion of potassium hydrogen tartrate crystals

2009

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Interfacial interactions between a hydroalcoholic solution of potassium hydrogen tartrate (KHT) and a stainless steel surface are studied, when an electrical potential is applied to the metal substrate. The capacitive domain of the metal-solution interface is determined by cyclic voltammetry. In order to study the influence of the potential on KHT nucleation and crystal adhesion, the solid-liquid interfacial energy is assessed from contact angle and capillary rise measurements. Experimentally, the contact angle between a NaF solution and a stainless steel vs. the potential has a parabolic behaviour. The metal topography has no apparent influence on physicochemical properties of the interface when ethanol is present in a KHT solution. The metal substrate promotes the formation of KHT crystals, which is improved by the application of an anodic potential. The adhesion of crystals becomes more effective when wires of 25 lm diameter are used in comparison with those of 250 lm.

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Nucleation studies of potassium hydrogen tartrate in model solutions and wines

Cited by 10 publications

References 9 publications

Effect of carboxymethylcellulose on potassium bitartrate crystallization on model solution and white wine

Effect of carboxymethylcellulose on potassium bitartrate crystallization on model solution and white wine

Potassium bitartrate crystallisation in wine and its inhibition

Influence of electrical potential on the crystallization and adhesion of potassium hydrogen tartrate crystals

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