MAK366
Total Sulfite Assay Kit (Colorimetric)
sufficient for 100 colorimetric tests
Sinônimo(s):
Sulfite Colorimetric Assay Kit
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About This Item
Código UNSPSC:
12161503
NACRES:
NA.84
Produtos recomendados
uso
sufficient for 100 colorimetric tests
aplicação(ões)
cosmetics
food and beverages
método de detecção
colorimetric
doença(s) relevante(s)
pulmonary disorders
temperatura de armazenamento
−20°C
Descrição geral
Sulfites/sulphites are substances that occur naturally in the human body due to the metabolism of amino acids containing sulfur in their side chains. They are readily oxidized to sulfates via enzymatic reactions and excreted in urine at the rate of 1000 mg/day. Sulfites are often considered as allergens due to adverse symptoms observed in asthmatic patients. Exogenous sources of sulphites include polluted air, food and beverages containing sulphur dioxide (SO2). SO2 is a molecule that easily reacts with several small compounds including aldehydes, ketones, anthocyanins, cobalamine, thiamine, NAD, flavins, among others. SO2 also interacts with cysteine residues in proteins and promotes cross-linking. Sulfites are also used as regulated food preservatives/additives/enhancers in dried fruits, wine, beer, etc. They are considered as GRAS (Generally Recognized as Safe) in food and beverages. In wine, SO2 reacts with sugars, aldehydes and anthocyanins. The term sulfite is used for all sulfite-derived molecules: bisulfites, metasulfites, and SO2. Total sulfite is defined as the sum of bound and free sulfite.
Adequação
Suitable for the measurement of sulfite in various food and beverage samples (for example wine, dairy, canned products, juices, dried fruit, etc.).
Princípio
The Total Sulfite Assay Kit is a simple and sensitive assay to detect small concentrations of sulfites in a variety of food and beverage samples. This assay is based on the oxidation of sulfite to sulfate producing a stable signal at A570 nm, which is directly proportional to the amount of sulfite in the sample. This assay is very sensitive and can detect as low as 20 μM of sulfite in a variety of samples
Palavra indicadora
Warning
Frases de perigo
Declarações de precaução
Classificações de perigo
Acute Tox. 4 Oral - Aquatic Chronic 3
Código de classe de armazenamento
10 - Combustible liquids
Ponto de fulgor (°F)
188.6 °F
Ponto de fulgor (°C)
87 °C
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