Total Sulfite Assay Kit (Colorimetric)

半岛bd体育手机客户端 说明

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). SO₂is a molecule that easily reacts with several small compounds including aldehydes, ketones, anthocyanins, cobalamine, thiamine, NAD, flavins, among others. SO₂also 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, SO₂reacts 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.

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.).

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

半岛bd体育手机客户端 性质

用途	sufficient for 100 colorimetric tests
detection method	colorimetric
储存温度	?20℃

安全信息

象形图
危险声明	H411
预防措施声明	P273 - P391 - P501
危险分类	Aquatic Chronic 2
储存分类代码	10 - Combustible liquids
WGK	WGK 2
闪点(F)	188.6 °F
闪点(C)	87 ℃