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Total Sulfite Assay Kit (Colorimetric)

产品编号:4073642
规格:sufficient for 100 colorimetric tests
包装规格:1 KIT
产品类别:进口试剂
品牌:Sigma-Aldrich
优惠价:立即咨询
产品价格
产品编号包装单位单价(元)国内现货国外库存询价单
40736421 KIT4950
产品性质
usage【用途】
sufficient for 100 colorimetric tests
Detection Method
colorimetric
storage temp.【储存温度】
−20℃
suitability【适用性】
Suitable for the measurement of sulfite in various food and beverage samples (for example wine, dairy, canned products, juices, dried fruit, etc.).
基本信息
General description【一般描述】
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.
Principle【原理】
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
安全信息
Pictograms【象形图】
GHS09
Hazard Statements
H411
Precautionary Statements
P273 - P391 - P501
Hazard Classifications【危险分类】
Aquatic Chronic 2
Storage Class Code【储存分类代码】
10 - Combustible liquids
WGK
WGK 2
Flash Point(F)【闪点(F)】
188.6 °F
Flash Point(C)【闪点(C)】
87 ℃
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