Hot sale lab 35 tests Nitrite Test kit
USD $11.5 - $15.9 /Piece
Min.Order:1 Piece
Hangzhou Lohand Biological Co., Ltd.
Specification:
Nitrite Test kit
Model: LH2009
Brand:LOHAND
Measuring range:
0.01-0.5mg/l
Packing: 35 tests/box
Shelf life: 12months
Background of development:
Nitrite is of high toxicity. It enables the ferrous ions in blood hemoglobin to be oxidized to ferric ions, then the ferrous ions loses the ability to combine with the oxygen, and the transport of oxygen in the body is impeded. It can bring acute poisoning to body, even brings a great danger to life when serious time.
Nitrite can lead to oxidative destruction of vitamin A and impedes the conversion of carotene into vitamin A, then cause a shortage of vitamin A in the body. At the same time, the nitrite which has entered into the intestines and stomach can easily be converted into nitrosamine when encounters the amine. Animal experiments which had been carried out proved the nitrosamine has a strong carcinogenicity.
The toxicity of the nitrite is a serious hazard to health, but the ecological environment on which human depend to survive has been suffered different degrees of pollution. Different amounts of nitrite have been found in soil, water and vegetables.
The principle of this method
This method equals to the diazo coupling method (GB/T8538-2008). The nitrite in the water is diazotized with p-aminophenyl sulfonamide, and then couples with N-(1-naphthyl)-ethylenediamine, finally generates a kind of purplish red azo-dye with which the colorimetric quantification can be done.
The features of the product:
Quick and easy
Operating in accordance with the instructions, users can complete the nitrite test independently without specialized training. 15 minutes is enough to complete the analysis of one sample.
Accurate and reliable
Determination results with this method are in accordance with the results with the standard method. It can be used as an alternative method to the standard method.
The range of the determination: 0.01mg/L~0.5mg/L (count by nitrite radical), if the concentrations is out of the range, please repeat the operation after appropriate dilution of the sample.
Quantitative packing
The kit can be used for 35 times. It is small, light and easy to carry.
Operation
1. Fill the round sample cell with 15ml of sample.
2. Add a pack of NO2-(Ⅰ) and shake to dissolve.
3.Add a pack of NO2-(Ⅱ) 5 minutes later and shake to dissolve too.
3.After 10 minutes, observe the color visually. Put the colorimetric tube to the blank of the standard card, then lift the tube up to 1cm, observe the color in the tube from top to bottom, find out the same level in the standard card. The concentration (mg/L) of the level which has the same color as the sample shows the concentration of nitrite of the sample.
Note:
(1)Oxidants and reductants will cause interference;
(2) The presence of Cu2+, Fe2+and nitrates make the test results on the low side;
(3) Metal ions such as lead, mercury, silver and etc. will cause interference by generating precipitate.
Application areas
This product can be used in analysis of nitrite in mineral water, surface water, underground water, domestic sewage, industrial waste water and food etc.
Our certificates
Own factory and facilities
FAQ
Q1: Why choose us?
A: 1. We have our own factory with strong R&D center and QA team which can make sure your goods can be sent out on time and in superior quality.
2. We have experienced and dedicated core members to offer you professional and reliable before-sales and after-sales service.
3. We have purveyed customers with the lowest wholesale price.
Q2: How do you guarantee the quality?
A: One year's guarantee from date on B/L. Normally. If it's quality problem, we promise to return goods or funds.
Q3: Is OEM available?
A: Yes, all goods can be custom made by your requirements, including packing, LOGO print, etc.
Q4: Can we buy 1 pc for sample testing?
A: Yes, we are glad to send 1pc for quality testing if we have stock of the model you required.
Q5: How to deliver the goods for trial order or small order?
A : For small order, we prefer to choose international express, such as DHL, TNT, EMS which are faster and more convenient for customer. Also, we cooperate with an express agent that can give us a big discount for express fee which is much lower than that quoted by official. For the goods with detachable battery, the express fee can be lower down if the goods is sent out without battery.
Q6: What kind of payment your company accept?
A : T/T , WEST UNION , PAYPAL , ETC.
Q7: If we have not found the model from website, what should we do?
A: Please email us with description and picture of the product, we research and develop new model every month, and some of them maybe have not been uploaded in website immediately. But If this is a new products for us, we can develop it for you after get all detailed information about your product.