Formaldehyde detection accuracy is critical, otherwise not allowed to detect what is the use? There are a lot of formaldehyde detection methods, qualitative and quantitative, qualitative and is able to test out there, this is not needed accuracy, or precision requirements are very low. The quantitative detection instrumentation required is high accuracy, high repeatability, and then there are very important things to have a very precise standard sample, for example, in plain, standard reference sample that seems to draw a radish, must first know what kind of radish, standard sample purity, directly affect the accuracy of the number of significant digits of data, often test results for similar 0.1235 like data, due to limitations of the standard sample, is effective only 0.12, while the back of the double-digit figures actually belongs invalid, does not have a reference value. Because of fugitive air standard sample characteristics, as well as affected by temperature and pressure, reproduction is not very good. Furthermore each assay methods are some factors, such as formaldehyde, phenol reagent method to measure widely used, it will be affected by sulfur dioxide, sulfur dioxide at higher environment, formaldehyde detection data is low compared with the actual data. And fast the data type electrochemical sensor detector, will be the impression of more factors, and even water vapor will greatly affect the accuracy of the data, such as the US company's 4160 interscan detector, as well as many domestic sensor detector, bias even reach 4-6 times the actual data. pid detector higher accuracy, credibility, but could not because of the portable pid detector equipped with chromatographic separation, said only about to test a variety of organic and values. Hefei formaldehyde treatment company www.rwwshb.com Address: Luyang Jinzhai Road No. 384 Financial Tower 14F