对于不透明的物质，取一定量被试物置于白色背景上，对样品的色度、色调和亮

For opaque substances, place a certain amount of the test object on a white background, evaluate the chroma, hue and brightness of the sample, and give qualitative descriptions such as "brown" and "light yellow". <br><br>When the peak is caused by an endothermic reaction, the temperature corresponding to the peak should be compared with the melting point of the substance. If the peak originates from an endothermic reaction that has nothing to do with the melting point of the substance, proceed as follows. <br><br>Compared with the effective ingredients of pesticides, the pesticide products contained in the production or storage process are obviously toxic to humans and the environment, or cause phytotoxicity to applicable crops, or cause pollution of agricultural products, or affect the quality and stability of pesticide products, or cause Impurities with other adverse effects. <br><br>For the determination and analysis of the content of each component in the pesticide technical, the main determination methods are chemical analysis, colorimetry and spectroscopy, thin layer chromatography, gas chromatography and high performance liquid chromatography.

For opaque substances, a certain amount of subjects were placed on a white background, the color, tone and brightness of the sample were evaluated, and qualitative descriptions such as "brown" and "light yellow" were given.<br><br>When the peak is caused by a heat absorption reaction, the temperature corresponding to the peak should be compared with the melting point of the substance, if the peak originates from a heat absorption reaction unrelated to the melting point of the substance, according to the following operation.<br><br>Compared with the active ingredients of pesticides, pesticide products contain impurities that are obviously toxic to humans and the environment in the course of production or storage, or that cause harm to suitable crops, or cause contamination of agricultural products, or affect the stability of pesticide product quality, or cause other adverse effects.<br><br>The main methods of determination and analysis of the content of various compositions in pesticide primary drugs include chemical analysis, color contrast and spectroscopy, thin-layer chromatography, gas chromatography and high-efficiency liquid chromatography.

For opaque materials, a certain amount of samples are placed on a white background to evaluate the chromaticity, hue and brightness of the samples and give qualitative descriptions such as "Brown" and "light yellow".<br>When the peak is caused by an endothermic reaction, the temperature corresponding to the peak should be compared with the melting point of the substance. If the peak originates from an endothermic reaction unrelated to the melting point of the substance, proceed as follows.<br>Compared with the active ingredients of pesticides, the impurities contained in the process of production or storage of pesticides are obviously toxic to human beings and the environment, or harmful to applicable crops, or cause pollution of agricultural products, or affect the quality stability of pesticide products, or cause other adverse effects.<br>Chemical analysis, colorimetry, spectroscopy, thin layer chromatography, gas chromatography and high performance liquid chromatography are the main methods to determine the content of each component in pesticide technical.<br>