US20150017303A1 - Anthocyanin-based colorant - Google Patents
Anthocyanin-based colorant Download PDFInfo
- Publication number
- US20150017303A1 US20150017303A1 US14/359,978 US201214359978A US2015017303A1 US 20150017303 A1 US20150017303 A1 US 20150017303A1 US 201214359978 A US201214359978 A US 201214359978A US 2015017303 A1 US2015017303 A1 US 2015017303A1
- Authority
- US
- United States
- Prior art keywords
- mol
- anthocyanins
- composition
- anthocyanin
- acylated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
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- 239000003086 colorant Substances 0.000 title claims abstract description 41
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- PFOARMALXZGCHY-UHFFFAOYSA-N homoegonol Natural products C1=C(OC)C(OC)=CC=C1C1=CC2=CC(CCCO)=CC(OC)=C2O1 PFOARMALXZGCHY-UHFFFAOYSA-N 0.000 description 1
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- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 description 1
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Images
Classifications
-
- A23L1/2751—
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B61/00—Dyes of natural origin prepared from natural sources, e.g. vegetable sources
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
- A23G9/00—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor
- A23G9/32—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor characterised by the composition containing organic or inorganic compounds
- A23G9/42—Frozen sweets, e.g. ice confectionery, ice-cream; Mixtures therefor characterised by the composition containing organic or inorganic compounds containing plants or parts thereof, e.g. fruits, seeds, extracts
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
- A23C9/00—Milk preparations; Milk powder or milk powder preparations
- A23C9/152—Milk preparations; Milk powder or milk powder preparations containing additives
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
- A23G3/00—Sweetmeats; Confectionery; Marzipan; Coated or filled products
- A23G3/34—Sweetmeats, confectionery or marzipan; Processes for the preparation thereof
- A23G3/36—Sweetmeats, confectionery or marzipan; Processes for the preparation thereof characterised by the composition containing organic or inorganic compounds
- A23G3/48—Sweetmeats, confectionery or marzipan; Processes for the preparation thereof characterised by the composition containing organic or inorganic compounds containing plants or parts thereof, e.g. fruits, seeds, extracts
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L19/00—Products from fruits or vegetables; Preparation or treatment thereof
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
- A23L2/52—Adding ingredients
- A23L2/58—Colouring agents
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
- A23L5/40—Colouring or decolouring of foods
- A23L5/42—Addition of dyes or pigments, e.g. in combination with optical brighteners
- A23L5/43—Addition of dyes or pigments, e.g. in combination with optical brighteners using naturally occurring organic dyes or pigments, their artificial duplicates or their derivatives
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
Definitions
- the present invention relates to the technical field of natural colorants, especially food colorants, which can be obtained from plant extracts, and further relates to the use of these colorants for food coloring.
- Colorants containing natural coloring substances are commonly used in the manufacturing of e.g. food products and pharmaceutical products.
- natural colorants there are increasingly strict requirements to be fulfilled for natural colorants to be accepted as a commercial coloring agent especially in the field of coloring food products, sweets and pharmaceuticals.
- a colorant must be stable under common use conditions. This means that in many food applications a colorant must be thermally stable against heat exposure occurring on the occasion of e.g. food pasteurization prior to packaging or heating by the consumer prior to consumption. Also, the colorants must show sufficient photostability, i.e. they must be stable against light exposure over the lifetime of the colored (food) product without substantial color change or disappearance (fading).
- the colorant must be stable against chemical interaction with other compounds in the environment of food.
- fruit preparations usually have a pH in the range 3.6-4.3 and more commonly 3.9-4.1 and in yoghurts usually have a pH in the range 4.1-4.7.
- the colorant itself may not have a strong taste and/or odor in itself.
- a colorant sometimes can have a strong taste and/or odor in itself, which would render it unsuitable as a colorant for certain (food) products. This is the case for colorant produced from red radish or red cabbage.
- Anthocyanins are well known as a group of compounds giving color to food, vegetables and flowers and are responsible for the blue, purple, violet, magenta, red and orange color of many plant species.
- Anthocyanins are water soluble, non-toxic pigments and therefore anthocyanins extracted from fruit and vegetables have been used as food colorants for providing colors in the orange to purple color range.
- the problem underlying the present invention resides in the provision of a new natural red-orange colorant especially suitable for food coloring, which is at least as stable as the known anthocyanin food colorants, has a high brightness and has a clear and distinct color tone.
- the red-orange color tone obtained is clearly different from the color tone of most other red anthocyanin colorants.
- the colorant should be free of off-tastes or off-odors which would make it unsuitable for use in food coloring applications, such as beverages.
- Red-orange color tones can also be obtained using other colorants, such as carminic acid or red radish extracts.
- carminic acid is obtained from an animal source (bugs) and thus is not suitable for vegetarian consumers.
- Red radish is problematic as it contains sulfur compounds and thus has an undesirable characteristic smell and taste.
- compositions wherein the majority of the anthocyanins are pelargonidin-based anthocyanins having a high acylation degree (i.e. molar ratio of acylated anthocyanins to all anthocyanins present) and having a specific minimum degree of acylation by hydroxycinnamic acid (i.e. a specific minimum amount of anthocyanins acylated with hydroxycinnamic acid).
- the present invention provides a composition, which is an anthocyanin-based colorant composition comprising 50-90 mol-%, based on the total amount of anthocyanins, of pelargonidin-based anthocyanins, and wherein
- composition has a red color with a hue value H in the L*C*h* color system in the range of 10-30, measured at an L*-value of (70.0 ⁇ 0.1) in a 0.1 mol/l trisodium citrate dihydrate buffer at pH 3 in a 1 cm-length quartz cell using Spectraflash 650 (Datacolor) in transmission mode under D65 illuminant 10 Deg.
- ⁇ 70 mol-% of all anthocyanins are acylated with at least one phenolic acid.
- the present invention provides the use of the above composition as a food colorant, specifically as a food colorant for beverages, food preparations, dairy, ice cream and confectionary, and preferably for beverages or fruit preparations having a pH in the ranges defined above.
- the present composition does not have an unpleasant taste and/or odor, and especially no unpleasant taste and/or odor linked to the presence of sulfur compounds. This renders the composition suitable for even coloring foods having a very weak taste and/or odor by themselves, such as pure or slightly flavored mineral waters, milk and various ice creams.
- the present composition does not contain sulfur-containing compounds providing an unpleasant taste and/or odor in an amount which makes the taste or odor of the composition unsuitable for food coloring.
- the present composition contains no, or only trace amounts, of such sulfur-containing compounds.
- the present composition preferably fulfils at least one of the following conditions (i)-(iii), more preferably two (i.e. (i)+(ii), (i)+(iii) or (ii)+(iii)), and most preferably all three thereof:
- the present composition preferably fulfills the conditions (i) and/or (iii), and more preferably does not contain a component derived from red radish or red cabbage.
- Anthocyanins (unsubstituted and shown in the cationic form) are compounds of the following chemical formula, wherein the groups R 3 ′, R 4 ′, R 3 , R 5 , R 6 and R 7 are H, OH or —OCH 3 :
- anthocyanidins The un-glycosylated forms of anthocyanins are the so-called anthocyanidins.
- the major representatives among them are cyanidin, delphinidin, malvidin, pelargonidin, peonidin and petunidin, which have the following formulae:
- Natural anthocyanins in fruit, vegetables and flowers are not present in their aglycone form, but rather are present in form of anthocyanins glycosides.
- sugar molecules are bound via an O-glycosidic bond to a hydroxy group, usually present in the 3- and/or 5-position of the anthocyanin molecule.
- a glycosylation is present on the 3-position and, if present, a second glycosylation is present on the 5-position.
- a hydroxy group present at position 7, 3′, 4′ or 5′ can be subject to glycosilation.
- sugars commonly found in anthocyanin glycosides are glucose, galactose, arabinose, rhamnose and xylose.
- glycoside structures can be present in only the 3- or the 5-position of the anthocyanin molecule (monoglycoside) or can be present in both the 3- and the 5-positions thereof (diglycoside). As said above, glycosylations may also be present at other positions.
- an acylated anthocyanin is an anthocyanin where the hydroxyl group of a sugar residue is substituted by a carboxylic acid under formation of an ester structure, wherein the carboxylic acid is esterified with a sugar moiety.
- Carboxylic acids suitable for acylation of anthocyanins and frequently found in natural anthocyanins are the hydroxycinnamic acids, (such as coumaric acid, caffeic acid and ferulic acid) and malic acid (see also below).
- Phenolic acids are suitable for acylation of anthocyanins.
- Phenolic acids are carboxylic acids having a phenol ring and a carboxylic acid group and include the groups of the benzoic acids and the already mentioned hydroxycinnamic acids.
- benzoic acid derivatives especially suitable are the so-called hydroxybenzoic acids of the following formula
- Hydroxycinnamic acids generally are understood as a group of compounds of the formula
- acylated anthocyanins in general show a higher stability (thermo-stability, photo-stability and chemical stability in physiological and/or food environments) as compared with non-acylated anthocyanins (C. Malien-Aubert et al., J. Agric. Food Chem., 49, 170-176 (2001)).
- the presently required degree of acylation i.e. the amount of acylated anthocyanins
- at least 70 mol-% of all anthocyanins present in the composition of the invention provides for a sufficient stability of the claimed colorants.
- at least 70 mol-% of all anthocyanins are acylated with at least one phenolic acid.
- the amount of acylated anthocyanins is at least 80 mol-%, more preferably at least 85 mol-%, even more preferably at least 90 mol-% based on all anthocyanins present in the composition.
- the acylation with hydroxycinnamic acids is especially preferred, i.e. the acylation with hydroxycinnamic acids renders the anthocyanins especially stable against the influences of light, heat and chemical degradation in a food environment.
- the degree of acylation by hydroxycinnamic acids in the present compositions is at least 20 mol-%.
- the degree of acylation by hydroxycinnamic acids with respect to stability can be up to 100%, for practical reasons it is preferably 20-80 mol-%, more preferably 25-75 mol-% or even 30-70 mol-% and 35-70 mol-% being especially preferred.
- the present invention relates to compositions comprising pelargonidin-based anthocyanins as the major anthocyanin component. More precisely, the amount of pelargonidin-based anthocyanins, based on all anthocyanins present in the composition of the present invention is 50-90 mol-%. Preferably, the amount of pelargonidin-based anthocyanins is 55-85 mol-%, more preferred 60-80 mol-%.
- the remainder of other (non-pelargonidin-based) anthocyanin colorants present in the composition of the invention can be any anthocyanin(s) as long as the total amount of anthocyanins shows the amount of acylated anthocyanins and the content of hydroxycinnamic acid acylation moieties defined above, and further shows a red-orange color hue within the range of 10-30, preferably 15-25, measured as defined above.
- the other anthocyanins usually represent minor and trace components of anthocyanin extracts obtained from suitable plant stock materials. These other anthocyanins are in general neither necessary nor desired, and can be removed by techniques well known to the person skilled in the art (e.g. by continuous or non-continuous chromatographic processes) However, if desired, other anthocyanins can be intentionally added to a pelargonidin-based anthocyanin composition to obtain a composition according to the invention.
- the present composition can be a juice or extract as obtained from a suitable plant stock, or can be further purified and/or supplemented with additional anthocyanin material.
- the invention also encompasses mixtures of two or more of any of such anthocyanin compositions.
- the present invention encompasses embodiments wherein the anthocyanin component consists of pelargonidin-based anthocyanins.
- non-anthocyanin coloring components may be present in the composition of the invention, as long as the color requirements defined herein are met.
- These can be coloring substances co-existing with anthocyanins in the plant juices or extracts used for preparing the present composition or can be intentionally added colorants of plant or other, preferably natural, origin.
- these other coloring components are in principle neither necessary nor desired, and thus preferably are kept at low levels.
- the present composition contains no non-anthocyanin coloring compounds, i.e. compositions wherein the coloring components consist of anthocyanin compounds are also preferred.
- Kuromanin is cyanidin-3-glucoside and is used as a standard for the determination of anthocyanin contents.
- a HPLC calibration curve of this compound is made to correlate the HPLC peak area to the kuromanin concentration (in mg/ml).
- a sample to be investigated is injected in HPLC to obtain a chromatogram, and the peaks areas of the anthocyanin peaks area are integrated and converted into concentrations (in mg/ml) using the kuromanin calibration curve.
- concentrations of anthocyanin compounds in the sample are expressed as mg/ml of kuromanin equivalent.
- the amount of anthocyanin in the composition is 2-40 mg/mL, preferably 2-30 mg/ml, more preferably 5-25 mg/ml and especially preferred 8-21 mg/ml or 10-18 mg/ml, for a colorant at 40-60% of dry matter.
- the present composition can also be present in form of a concentrate.
- the dry matter content is preferably 10-95 wt.-%, more preferably 15-85 wt.-% and especially 20-60 wt.-%.
- the present composition could be present as a powder.
- the anthocyanin content can be preferably be in the range of 1-10 wt.-%, more preferably 2-5 wt.-%, based on the total weight of the composition.
- the dry matter content of a sample can be determined by weighing accurately 1-2 g of the sample in liquid or powdered form and putting it into a dry porcelain cupel, storing the cupel in a dry oven at 110° C. for 2 h (powders) or 3 h (liquids), cooling the sample in a desiccator and weighing it again.
- the dry matter content (wt.-%) is 100 ⁇ (sample weight after drying/sample weight weighed into the cupel).
- the present composition is present in the form of a concentrate presenting a °Brix of 20-80, preferably 25-75 and especially preferred 30-70.
- the respective ranges of the invention as defined above could be achieved by selectively removing undesirable anthocyanin components. This can be achieved by commonly known techniques, such as chromatographic methods as well known to the skilled person in the present technical field. Additionally or alternatively, the missing (depleted) compounds can be added in the amounts needed.
- sugars for forming anthocyanin glycosides as well as the carboxylic acids forming acylated anthocyanins as mentioned above represent examples and preferred examples only, while the present invention is not restricted to these sugars and/or carboxylic acids.
- the present coloring composition has a red-orange color hue having a hue value range in the CIELAB L*C*h* color system in the range of 15-25, when measured at an L* value of (70.0 ⁇ 0.1) in a 0.1 mol/L trisodium citrate dihydrate buffer at pH 3 in a 1 cm length quartz cell using spectra flash 650 (data color, in transmission mode under D65 illuminant 10 Deg).
- red radish anthocyanin extracts usually show a distinct off taste resulting from the presence of sulfur-containing compounds in red radish, so that these colorant extracts are usually not suitable as food colorants in any application, and especially for coloring beverages and certain foods such as ice cream, dairy and confectionary.
- compositions obtained from extracts of red radish are excluded from the present invention.
- extracts from red radish does not contain detectable amounts of peonidin-based anthocyanins.
- 445 mol-% of all anthocyanins of the composition are peonidin-based anthocyanins.
- the acylation of anthocyanins by at least one organic acid or at least one phenolic acid (preferably by at least one phenolic acid) as well as the specific acylation by hydroxycinnamic acid as required by the present invention can be present in pelargonidin based anthocyanins as well as on other anthocyanins present in addition to the 50-90 mol-% of pelargonidin-based anthocyanins.
- the acylations are predominantly present on the pelargonidin based anthocyanins, and preferably at least 80 mol-%, more preferably at least 85 mol-% of all pelargonidin-based anthocyanins present in the composition are acylated.
- 100% is possible and included within the scope of the present invention. However, for practical reasons other alternative upper limits are 99 mol-%, 97 mol-% or 95 mol-%.
- acylation with hydroxycinnamic acid is predominantly present on pelargonidin-based anthocyanins, and preferably 15-95 mol-% or 25-90 mol-% of the pelargonidin-based anthocyanins present in the present composition are acylated by at least one hydroxycinnamic acid.
- the pelargonidin-based anthocyanins in the present composition include one or both of the following pelargonidin derivatives (1) and (2):
- the amount of the pelargonidin derivative (1) is 5-55 mol-%, more preferably 10-50 mol-%, even more preferably 15-45 mol-%, yet more preferably 20-40 mol-% and especially preferably 25-35 mol-%.
- the content of pelargonidin derivative (2) is preferably 3-60 mol-%, more preferably 5-58 mol-%, even more preferably 8-56 mol-%, yet more preferably 13-54 mol-% and especially preferably 18-52 mol-% or 23-50 mol-%.
- the higher values of the lower limits are more preferred for the reason that the coloring compositions having improved colorant properties are achieved.
- the lower values of the upper limits are not specifically preferable over higher upper limits in terms of coloring properties, but rather are more easily to achieve in practice from natural plants extracts, and thus may be preferred for commercial reasons.
- the present colorant composition provides a stable and bright red-orange coloring composition, which is especially suited for food coloring, and especially for coloring beverages, food preparations, dairy, ice cream and confectionary. Due to the lack of off taste and off flavors, e.g. off taste and off flavors linked to the presence of sulfur compounds, the present coloring composition can also be used for coloring sensitive food compositions such as beverages, dairy, ice cream and confectionary without negative effect on the overall flavor and taste thereof.
- the present composition can, in principle, be made from pure anthocyanin compounds, can be composed from extracts of different plant varieties, or can be obtained by extracting one single plant variety and if needed, refining to obtained extract.
- a preferred source of the present composition would be a plant variety the extract of which can directly be used as a composition of the present invention.
- RSWP red variety of sweet potato Ipomoea batatas ( L. ) Lam
- the present composition is obtainable from juices or extracts of RSWP, including both compositions consisting of or mainly comprising juices or extracts of RSWP.
- FIG. 1 Chromatographic profile (top) at 520 nm and mass fingerprint (bottom) of anthocyanins from red sweet potato.
- FIG. 2 UV-visible spectra of the two major anthocyanins isolated from red sweet potato extract.
- FIG. 3 Structure of Anthocyanin 1.
- FIG. 4 Structure of Anthocyanin 2.
- FIG. 5 Evolution of DE*2000 during the 2-month storage of colored model beverage medium in cold room.
- FIG. 6 Evolution of DE*2000 during the 2-month storage of colored model beverage medium under light exposure.
- FIG. 7 Evolution of DE*2000 during the 2-month storage of colored model beverage medium under heat exposure.
- FIG. 8 Evolution of DE*2000 during the 2-month storage of colored model beverage medium containing ascorbic acid in cold room.
- FIG. 9 Evolution of DE*2000 during the 2-month storage of colored model beverage medium containing ascorbic acid under light exposure.
- FIG. 10 Evolution of DE*2000 during the 2-month storage of colored model beverage medium containing ascorbic acid under heat exposure.
- FIG. 11 Evolution of DE*2000 during the 2-week storage of fruit preparation/white mass blends in cold room at 4° C.
- FIG. 12 Evolution of DE*2000 during the 1-month storage of the colored fruit preparation.
- RSWP Red Sweet Potato
- carminic acid has been used in some instances herein, since it obtains a very stable orange shade when it is added to beverages and thus can be seen as a reference colorant in at least this field of application.
- the legally admissible concentrations of carminic acid in beverages are too low to achieve the color shades as achievable with anthocyanins, and especially as achievable with the composition of the present invention.
- carminic acid at the intended color shades might show a superior stability of carminic acid, such an embodiment would be unsuitable in practice due to inadmissible high carminic acid levels. Therefore, carminic acid has been used as a reference only, for comparison known anthocyanins have been chosen.
- a RSWP concentrate prepared by chopping RSWP tubers into slices and “washing” them 4 times with acidified water to conduct an extraction, and then subjecting the obtained extract to micro-filtration and subsequent purified on an absorbing resin.
- the resulting anthocyanin extract was concentrated and then pasteurized.
- Anthocyanins were isolated and concentrated on a Sep-Pak C18 cartridge (Waters®). The cartridge was washed with 2 ml of methanol and then with 2 ml of acidified water (HCl 0.3%) before loading few drops of RSWP concentrate. Once the cartridge has been washed with 4 ml of acidified water (HCl 0.3%), and then with 2 ml of ethyl acetate, anthocyanins were finally eluted with a minimum volume of acidified methanol (HCl 0.1%).
- the anthocyanin extract was analyzed by fast-HPLC/ESI-TI. Separation was obtained at 30° C. using a BEH (Waters®) C18 Column (50 mm ⁇ 2.1 mm, 1.8 ⁇ m), by injecting 1 ⁇ L of the filtered extract.
- the mobile phase consisted of two solvents: A, Water/Acetonitrile/HCOOH (95.7/3.3/1, v/v/v) and B, Water/Acetonitrile/HCOOH (44/55/1, v/v/v) at a flow rate of 0.8 ml/min.
- the gradient used was as follows:
- Mass spectrometry analyses were performed on a Bruker Daltonics HCT Ultra, operating in the positive electrospray ionization mode. Ions to be fragmented in MS 2 or MS 3 were automatically chosen by the software. Fragmentation is obtained through a screening of power leading in a determination of the minimal power necessary to break down the linkages.
- FIG. 1 The chromatographic profile of anthocyanins from RSWP is presented on FIG. 1 .
- This profile reflects the presence of two major peaks, eluted at 28.8 and 37.6 min, and numerous other anthocyanins in low amount. Thanks to mass spectrometry data, eleven different compounds were characterized; their maximum absorption wavelength and their mass fragmentations are displayed in Table 1. A tentative identification of the core anthocyanin of each compound was realized, and shows a majority of pelargonidin-derived pigments in RSWP.
- Mass spectrometry revealed the presence of two different anthocyanins under the major peak, this peak being principally made up of the compound based on pelargonidin (m/z 877).
- Anthocyanin 1 This first characterization of anthocyanin from RSWP showed the presence of two major anthocyanins referred to herein as Anthocyanin 1 and Anthocyanin 2, respectively. These compounds have molecular weight of 877 and 1039 g/mol and are both based on pelargonidin. Their characteristics are shown in Table 1, together with other pelargonidin-based anthocyanins found in minor amounts in RSWP.
- Anthocyanin 1 and Anthocyanin 2 based on all anthocyanins, was estimated to be 46.1 mol-%.
- a RSWP concentrated extract at 8 CU/kg was extracted using ethyl acetate in order to remove phenolic compounds except anthocyanins.
- a volume of 30 ml of concentrated extract was diluted in 270 ml of acidified water (pH3) and then washed three times with 300 ml of ethyl acetate. The aqueous phase was concentrated under vacuo.
- the anthocyanin extract obtained was purified on a Sephadex LH2O column (400 mm ⁇ 260 mm, Pharmacia), being eluted with acetic acid/water (4.6:100, v/v) at a flow rate of 16 ml/h. Two red-colored bands were collected. All fractions collected were analyzed by HPLC and fractions of high purity 85%) were grouped together.
- Analytical HPLC was performed using a LiChrosorb RP-18 Column (250 mm ⁇ 4.6 mm, 5.0 ⁇ m) by injecting 10 pl of the filtered extracts. A combination of two solvents was used for elution: A, Water/HCOOH/Acetonitrile (87/10/3, v/v/v) and B, Water/HCOOH/Acetonitrile (40/10/50, v/v/v). The column flow was set at 0.8 ml/min. and the column temperature at 30° C. The gradient used was as summarized below:
- NMR experiments 1 H, COSY, ROESY, HSQC, HSQC-TOCSY, HMBC, 13 C
- the NMR experiments were obtained at 600.13 MHz on a BRUKER Avance II 600 instrument equipped with a TCI 1 H- 13 C/1 5 N CryoProbe at 27° C.
- Dried samples were solubilized in 500 ⁇ l in DMSO-d6-TFA-d 99.99% 90:10.
- Anthocyanin 1 was identified as pelargonidin 3-O-(2-O-(6-O-para-hydroxybenzoyl-glucopyranosyl)-glucopyranoside)-5-O-glucopyranoside:
- Anthocyanin 2 has been identified as pelargonidin 3-O-(2-O- (6-O-para-hydroxybenzoyl-glucopyranosyl)-6-O-trans-caffeoyl-glucopyranoside)-5-O-glucopyranoside:
- RSWP liquid concentrate is evaluated for its shade against other anthocyanin references and for stability during cold storage.
- Samples of liquid concentrate were stored in cold room at 4-8° C. during 6 months including regular analytical evaluation. Samples were sacrificed after each evaluation. Bulk stability was evaluated through spectrophotometric and colorimetric measurements, turbidity, and amount of sludges.
- Spectrophotometric measurements were performed in 1cm-length quartz cell in a pH3 buffer using spectrophotometer HP8354. Red sweet potato concentrate was characterized through color strength E3 (expressed in color unit/kg).
- Table 4 provides comparative color parameters of RSWP concentrate and red radish powder, and Table 5 shows the cold storage stability of RSWP concentrate.
- RSWP concentrate presents similar brightness as pure red radish but its shade is more red-orange.
- RSWP concentrate kept in cold conditions is highly stable considering color as well as physico-chemical parameters.
- RSWP concentrate is evaluated in a model beverage medium submitted to a pasteurization step for determining cold, heat and light stabilities against two standard references having similar shades and being used in this application.
- the model beverage medium was prepared according to the following recipe.
- a soft drink concentrate around 40° Brix was obtained and further diluted with Milli Q water until 11° Brix.
- the pH was finally adjusted to 3.0 ⁇ 0.2 with citric acid.
- Table 6 summarizes the shades of the model beverage medium colored with RSWP or the references at day 0.
- RSWP Beverage colored with RSWP is slightly duller than the one colored with carminic acid but is brighter than the beverage colored with rr/bc. Shades brought by the RSWP concentrate and the comparison (rr/bc) and the reference (carminic acid) are similar.
- Table 7 shows the color stability after pasteurization (HT) of the model beverage medium colored with RSWP or rr/bc.
- Beverage colored with RSWP is more stable through pasteurization compared to the beverage colored with rr/bc. However it remains slightly more sensitive than a beverage colored with carminic acid.
- FIG. 5 shows the evolution of DE*2000 along the 2-month storage of colored model beverage medium in cold room.
- the beverage colored with RSWP is as stable as the one colored with carminic acid after 2-month light exposure (no visual shift of shade is detected in both cases) and is far more stable in both tests than a beverage colored with rr/bc, which undergoes a wide evolution of coloration.
- RSWP concentrate is evaluated in a model beverage medium containing ascorbic acid for determining cold, heat and light stabilities against a standard reference having similar shade.
- the model beverage medium prepared in Example 5 was used, except that 250 ppm ascorbic acid was added before final adjustment of pH to 3.0 ⁇ 0.2 with citric acid.
- Example 5 The colors were added in the same manner as described in Example 5, and then the colored beverages were poured into PET bottles and stored under the conditions defined in Example 5. Colorimetric follow-up and measurements were then also performed as defined in Example 5.
- FIG. 8 shows the evolution of DE*2000 along the 2-month storage of colored model beverage medium in cold room.
- Beverage colored with RSWP is as stable as the one colored with carminic acid after 2-month light exposure in presence of ascorbic acid and the shift of shade is limited. Contrary thereto the beverage colored with rr/bc present a far lower stability to light exposure in presence of ascorbic acid.
- the beverage colored with RSWP while presenting a not yet optimal stability such as carminic acid, provides a large improvement over rr/bc, considering the evolution of shade associated with the use of this traditional comparative colorant.
- RSWP concentrate is evaluated in a fruit preparation application for determining stabilities during storage of the fruit preparation itself and storage of a blend fruit preparation/white mass against a standard reference being used in this application.
- the model fruit preparation is a strawberry fruit preparation at pH 3.82 and 40.3°Brix.
- the colors were added directly into the fruit preparation at following dosages:
- Model white mass is a commercial product containing 3.5% fat.
- Colored fruit preparation was incorporated into the white mass at a weight ratio of 15/85 and the mixture was further pasteurized at 90° C. for 5 minutes.
- the colored fruit preparations were stored during one month at 10° C. and mixtures of fruit preparation/white mass were stored for 14 days in a cold room at 4° C. in the dark.
- Colorimetric follow-up was done every week during two weeks for blends fruit preparation/white mass, and after one month storage for fruit preparations alone. Measurements were performed in Petri boxes using Datacolor SF 450 in reflection mode.
- Table 8 summarizes the shades of the blends fruit preparation/white mass colored with RSWP or the carmine lake reference at day 0 before the pasteurization step.
- the blend colored with RSWP is duller and more orange that the one colored with carmine lake.
- Table 9 shows the stability of blends fruit preparation/white mass colored with RSWP or the carmine reference during the pasteurization step.
- FIG. 11 shows the evolution of DE*2000 during the 2-week storage of fruit preparation/white mass blends in cold room at 4° C.
- Blend fruit preparation/white mass colored with RSWP concentrate is less stable compared to the one colored with carmine lake under cold storage. Evolution of shade is visually detectable in former case but is considered as acceptable based on the DE 2000 value below 2.
- FIG. 12 shows the evolution of DE*2000 during the 1-month storage of the colored fruit preparation.
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CN113924000A (zh) * | 2019-05-31 | 2022-01-11 | 科汉森天然色素有限责任公司 | 一种用于脂肪基食品和油的红色着色剂组合物 |
US20220015398A1 (en) * | 2020-07-17 | 2022-01-20 | Gnt Group B.V. | Composition comprising spirulina extract |
CN115996644A (zh) * | 2020-08-31 | 2023-04-21 | 奥特拉有限责任公司 | 用于基于植物的肉类替代品的色料 |
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WO2015004275A1 (en) * | 2013-07-11 | 2015-01-15 | Chr. Hansen A/S | Color composition comprising carmine pigment and ferrous ions |
CN104672196B (zh) * | 2015-03-05 | 2018-07-27 | 贵州省生物研究所 | 一种蓝莓花青素抗氧化性能增强方法 |
CN105504865A (zh) * | 2015-12-15 | 2016-04-20 | 重庆大学 | 一种酯化修饰萝卜红色素的制备及纯化方法 |
CN107157820A (zh) * | 2016-03-08 | 2017-09-15 | 上海魅妃化妆品有限公司 | 一种半永久化妆用植物色乳 |
RU2672396C1 (ru) * | 2018-02-28 | 2018-11-14 | Общество с ограниченной ответственностью "Сташевское" | Способ получения антоцианов из растительного сырья |
WO2020047276A1 (en) | 2018-08-31 | 2020-03-05 | Mars, Incorporated | Anthocyanin-based colorant compositions and methods of use thereof |
JP7473135B2 (ja) | 2019-03-04 | 2024-04-23 | 国立研究開発法人農業・食品産業技術総合研究機構 | サツマイモ植物及びサツマイモ由来アントシアニン系色素組成物 |
WO2021067627A1 (en) | 2019-10-01 | 2021-04-08 | Mars, Incorporated | Enzymatic treatment of anthocyanins |
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CN113924000A (zh) * | 2019-05-31 | 2022-01-11 | 科汉森天然色素有限责任公司 | 一种用于脂肪基食品和油的红色着色剂组合物 |
US20220015398A1 (en) * | 2020-07-17 | 2022-01-20 | Gnt Group B.V. | Composition comprising spirulina extract |
CN115996644A (zh) * | 2020-08-31 | 2023-04-21 | 奥特拉有限责任公司 | 用于基于植物的肉类替代品的色料 |
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HK1200478A1 (zh) | 2015-08-07 |
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BR112014012578A2 (pt) | 2017-06-06 |
CN103958614B (zh) | 2019-10-18 |
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MX2014006254A (es) | 2014-07-22 |
WO2013079518A1 (en) | 2013-06-06 |
EP2785798B1 (en) | 2024-03-13 |
EA025212B1 (ru) | 2016-11-30 |
BR112014012578B1 (pt) | 2021-05-25 |
AU2012343946A1 (en) | 2014-05-29 |
CA2856953A1 (en) | 2013-06-06 |
US20200253237A1 (en) | 2020-08-13 |
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EP2785798C0 (en) | 2024-03-13 |
AU2012343946B2 (en) | 2017-04-13 |
EP2785798A1 (en) | 2014-10-08 |
EA201491055A1 (ru) | 2014-09-30 |
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