The heavy metals mentioned in terms of environmental pollution mainly refer to metals or metals such as mercury, cadmium, lead, chromium, arsenic, and also general heavy metals with certain toxicity, such as copper, zinc, nickel, cobalt, and tin. Heavy metals such as lead, cadmium, mercury, and arsenic are due to the development of industrial activities, which cause enrichment in the human environment and enter the human body through the atmosphere, water, and food. Heavy metals accumulate in certain organs of the human body, causing chronic poisoning and endangering human health. The main factors determining the toxicity of pollutants are their physical properties, content, and form.
Atomic absorption spectroscopy and atomic emission spectroscopy, which are mainly used for the qualitative analysis of inorganic elements, complement each other and have become the main means for quantitative analysis of inorganic compound. Nowadays, due to the development of computer technology, chemometrics and the emergence of a variety of new components, the precision, accuracy and automation of atomic absorption spectrometers have been greatly improved.
Atomic fluorescence spectroscopy is a method for determining the content of an element to be tested by measuring the intensity of fluorescence emission generated by the atomic vapor of an element to be tested at a specific frequency. Environmental monitoring, medicine, geology, agriculture, drinking water and other fields have been widely used.
This method can continuously measure a plurality of metal ions at a time, and has high sensitivity, and can measure metal ions of 107-109 mol/L. The instrument used in this method is relatively simple and easy to operate. It is a good trace analysis method and can be used for on-site environmental emergency detection.
X-ray fluorescence spectroscopy is a method of determining the composition of a sample by using the sample's absorption of x-rays as a function of the composition of the sample and how much it changes. It has the characteristics of rapid analysis, simple sample preparation, wide range of analytical elements, simple spectral lines, less spectral interference, sample morphology diversity and non-destructive determination.
BOC Sciences can provide professional analysis and testing services in materials, energy, chemical, biological, environmental, and other fields. It can provide one-stop services such as inspection and testing, consulting and appraisal, and quality control for various enterprises and institutions. BOC Sciences has international advanced testing instruments and strong technical force. It can complete various inspection tests and issue authoritative test reports according to various testing standards.