GB/T 18012-2021 Specifies the determination method of pH value of latex. It is suitable for all kinds of latex, detailing sample collection and preparation to ensure that it is representative. Using instruments such as acidity meters, from calibrating electrodes to measurement operations, each step is strictly standardized, covering temperature, humidity and other measurement environment requirements. There are also clear regulations on data recording and result processing to ensure accurate and reliable measurement results. This standard is a key basis for latex quality control, which helps to judge latex stability and processing adaptability. It is widely used in latex production, processing and related product manufacturing industries to promote the development of industrial standardization.