The direct-reading spectrometer is a quantitative analysis with accurate measurement results, good repeatability and long-term stability. The hand-held spectrometer is a qualitative and semi-quantitative analysis. It is used to identify material grades. The test is convenient, but it cannot measure materials with high accuracy requirements. The following editors will analyze their advantages and disadvantages from the following aspects.
First, the size of the test sample Direct-reading spectrometers
have strict requirements on the sample size. The sample must have at least a flat surface that is not less than the excitation cavity, and the thickness cannot be less than 1.5mm (generally recommended is not less than 3mm), while the handheld spectrometer has a size and thickness of the sample. Without such high requirements, general samples can be tested.
Second, the detection environment is different
The direct-reading spectrometer can only be used in the laboratory, and the ambient temperature and humidity fluctuations should not be too large, which will seriously affect the detection effect; while the handheld spectrometer can detect work whether indoors or outdoors.
Third, the degree of damage of the test sample
The direct-reading spectrometer is a destructive test. During the excitation process, small pits with a diameter of about 8 mm are formed on the surface of the material. Direct-reading spectrometers are not suitable for precious metals and decorative metals. The handheld spectrometer is a non-destructive test. The test itself does not affect the sample. Produce any adverse effects. In terms of flexibility, the handheld spectrometer also has a higher utilization rate. The size of the direct-reading spectrometer to detect the sample must be suitable for the table. Too large and long samples must be destroyed before detection.
Fourth, the accuracy of the data
The two elements of carbon and nitrogen can only be detected by direct reading spectrometers. It is recommended to use direct reading spectrometers for accurate determination of non-metal elements such as phosphorus and sulfur and for places with high accuracy requirements (requires data fluctuations below 0.05%); Other qualitative and semi-quantitative, precision requirements are generally recommended to use a handheld spectrometer.