The USP test method for Estradiol Valerate Injection uses Folin & Ciocalteu′s phenol reagent as part of the release testing procedure.
The product is quality tested only for its suitability for use in the Lowry Protein Determination.
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A propos de cet article
form
liquid
Quality Segment
concentration
1.9-2.1 N
color
clear yellow, faint yellow to very dark yellow, and Faint Green-Yellow to Very Dark Green-Yellow
pH
<0.5 (20 °C)
density
1.240 g/cm3 at 20 °C
suitability
suitable for determination of total protein by Lowry method
application(s)
diagnostic assay manufacturing
hematology
histology
storage temp.
room temp
General description
stabilisée au tartrate double de potassium et de sodium). L′ajout du réactif phénolique génère des chromogènes qui augmentent l′absorbance entre 550 et 750 nm. Typiquement, le pic d′absorbance (750 nm) ou son épaule (660 nm) sont utilisés pour déterminer la concentration des protéines entre 1-100 mg/ml, tandis que l′absorbance à 550 nm est utilisée pour déterminer les concentrations plus élevées.
En l′absence de cuivre, l′intensité de la coloration est déterminée principalement par le contenu en tyrosine et en tryptophane des protéines, et dans une moindre mesure en cystéine et en histidine. Le cuivre(II) n′a aucun effet sur la formation d′une coloration par la tyrosine, le tryptophane ou l′histidine, mais réduit la formation de coloration par la cystéine.[1][3][4][5][6]
De nombreuses modifications de la procédure initiale du dosage ont été publiées[3], dont des méthodes pour accélérer le développement de la coloration[5][7], pour déterminer la teneur en protéines insolubles[1][8] et pour automatiser la procédure.[9] Plusieurs substances comme de nombreux tampons, agents chélateurs, détergents et composés organiques cycliques peuvent interférer avec le dosage des protéines selon Lowry.[3]
Le réactif phénolique de Folin-Ciocalteu peut également être utilisé comme réactif en aérosol dans les procédures chromatographiques.
Application
Other Notes
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Cet article | |||
|---|---|---|---|
| suitability suitable for determination of total protein by Lowry method | suitability - | suitability - | suitability - |
| color clear yellow, faint yellow to very dark yellow, and Faint Green-Yellow to Very Dark Green-Yellow | color - | color - | color - |
| concentration 1.9-2.1 N | concentration 2 M (with respect to acid) | concentration - | concentration - |
| application(s) diagnostic assay manufacturing | application(s) - | application(s) - | application(s) - |
| form liquid | form - | form - | form - |
| Quality Level 200 | Quality Level 200 | Quality Level 100 | Quality Level 200 |
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signalword
Danger
hcodes
Hazard Classifications
Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1
Classe de stockage
8B - Non-combustible corrosive hazardous materials
wgk
WGK 2
flash_point_f
Not applicable
flash_point_c
Not applicable
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Is it can be used for identification test of Estradiol Valerate Injection?
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We have received Folin & Ciocalteus phenol reagent F9252-100mL, PCode: 102600991, Source: BCCJ8511 from Sigma(Merck). Is the reagent suitable for Phenol content determination? Is the reagent prepare by following BP/EP?
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This product is not tested according the BP or JP guidelines. This reagent is not recommended for the determination of phenols. HIstorically, the performance of this product in the determination of phenolic compounds, typically run in wineries, has proven to be unpredictable. It is recommended for use primarily in Lowry protein determination.
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貴社が販売しているFolin & Ciocalteuフェノール試薬は毒物や劇物に該当しないとの認識でよろしいでしょうか。
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The information requested can be found on the Product Safety Data Sheet. The document can be downloaded from the top right-hand side of the Product Detail Page under ‘Documents’. A Safety Data Sheet can also be downloaded from the following link: https://www.sigmaaldrich.com/search
Please refer to Section 2 for the various hazards associated with this material. The bottle label will show a "Danger" pictogram and is considered a dangerous product.
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How do I differentiate the spectrophotometric result obtained from this reagent is either because of reaction with phenols or non-phenolic reducing substances? Thanks.
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The type and amount of non-phenolic compounds present is a given sample will determine the impact on the total phenol values. The use of a standard curve is critical. Factors such as pH adjustment can minimize the effects. Reducing compounds may be identified and quantified separately or removed from the sample by various means. See the links below to review several publications that may be useful.
https://waterhouse.ucdavis.edu/folin-ciocalteau-micro-method-total-phenol-wine
https://www.mdpi.com/2076-3417/13/4/2135
https://pubs.rsc.org/en/content/articlelanding/2013/ay/c3ay41125g
https://link.springer.com/chapter/10.1007/978-3-319-45776-5_25Additional assistance can be provided by our Technical Service team who can assist you further. We kindly ask you to navigate to the link https://www.sigmaaldrich.com/techservice, click on "Product Technical Inquires" under the Products Section with all the required information so that a member of our team can reach out to you to assist further. Thank you.
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What should Product F9252, Folin & Ciocalteu's phenol reagent, look like?
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The Folin & Ciocalteu's phenol reagent should be a clear yellow solution. If the solution turns green, it may not be suitable and it should not be used.
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Can Product F9252, Folin & Ciocalteu's phenol reagent, be used to detect any protein?
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If the protein has an abnormally low tyrosine content, this method would not be suitable.
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What concentrations of proteins does Product F9252, Folin & Ciocalteu's phenol reagent, detect?
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Generally, Folin & Ciocalteu's phenol reagent is used to determine protein concentrations between 1 to 100 μg/mL. However, the reagent exhibits a linear response to protein concentration up to 1000 μg/mL when used according to the instructions for kit Product No. TP0200.
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What is the Department of Transportation shipping information for this product?
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Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
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Does Product F9252, Folin & Ciocalteu's phenol reagent, contain phenol?
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The Folin & Ciocalteu's phenol reagent does not contain phenol but reacts with phenol and non-phenolic reducing substances to form chromogens that can be detected spectrophotometrically.
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