GB/T 18012-2008 specifies the determination method of the pH value of natural latex. The standard covers the collection and preparation of natural latex samples to ensure that they are representative. Use appropriate measuring instruments, such as acidity meters, and operate according to the standard process, including electrode calibrating, measurement environment control, etc. Describe the measurement procedure and result processing methods in detail to ensure the accuracy and reliability of the measurement results. The standard is essential for the quality control of natural latex, which helps to judge its stability and processing applicability. It is widely used in the production, processing and related industries of natural latex, and helps to improve the mass of products.