Arsenic test kits

1. Specification

Name: Arsenic Test Kit

Model: LH2026

Type: semi-quantitative

Color reaction: white- yellow

Gradation: 0.004-0.008-0.016-0.028-0.04-0.052-0.064-0.08mg/L(As^2+/5+)

Packaging detail: 20units/box

Application areas: the test kit is an ideal testing solution for water supply organizations, especially in countries where the soil is known or suspected to be contaminated with arsenic and for emergency response units that operate emergency water supply units.

2. Feature

Quick and easy

Users do not need additional instruments and no calibration or maintenance of the testing device is necessary. This ensures safe results with minimal effort. And users can complete the arsenic test independently without specialized training. 30 minutes is enough to complete the analysis of one sample.

The especially sensitive test yields results below the WHO/EU limit (0.01 mg/L) for arsenic down to 0.004 mg/L. Thus, dangerous arsenic contamination of drinking water above the WHO limit can be detected easily and reliably.

Accurate and reliable

This method equals to the standard method that is arsenic spot method (GB/T5750.6-2006). The process of reaction is that pentavalent arsenic reduces to trivalent arsenic, and zinc reacts with acid to generate new eco-hydrogen, then trivalent arsenic reacts with the new eco-hydrogen to yield hydrogen arsenide. Using lead acetate cotton to remove the interference of hydrogen sulfide, a yellow-brown spot is generated on the mercury bromide test paper. We can do the quantitative analysis by compare the depth of spot color.

3. Operation

1. Clip a paper in the top of arsenic test tube which has been filled with lead acetate cotton in the bottom previously, then transfer 25mL water sample to arsenic test bottle,

2. Adding a packet of reagent I, 5 drops of reagent II, 5mL reagent III and a packet of reagent IV in turn and stuffing the arsenic test tube immediately. A shake is required after each reagent has been added.

3. Remove the test strip and compare with the standard card after 30 minutes. The concentration of the level which has the same color as the paper shows the content of the arsenic (μg/25mL).Note:

(1) Measured on the temperature of 10 ~ 30ºC.

(2) Hydrogen arsenide is toxic, please be careful in handling.

(3) The reagents and related products in this kit should be stored in a dark, cool and dry place.

4. Background of development

Sources of arsenic:Arsenic (As) is a kind of elements non-essential to the human body, under normal circumstances. There is trace amount of arsenic in soil, water, air, plants and human body. This is not a hazard to humans. Arsenic pollution mainly comes from industrial wastewaters of the mining, metallurgy, chemical industry, chemical pharmaceutical, pesticide production, textiles, glass, leather and other sectors.

The significance of arsenic test Arsenic element is of low toxicity, but arsenic compounds are highly toxic. Trivalent arsenic compounds are more toxic than others. Arsenic enters into human body by respiratory, digestive and skin contact. If the intake of arsenic exceeds the excretion of arsenic, it would be accumulated in the liver, kidney, lung, spleen, uterus, placenta, bones, muscles and other parts of human body, especially in the hair and nails, which lead to chronic arsenic poisoning and the period of incubation up to years or even decades. The symptoms of chronic arsenic poisoning are the digestive system symptoms, nervous system symptoms and skin lesions. The arsenic is also a kind of carcinogenic and can cause skin cancer.