Which law stipulates that laboratory technicians must have a qualification certificate?

it depends on what instrument you use. If they are all fully automatic fool-operated instruments, then a fool can operate them. If it is necessary for the laboratory technician to conduct the test manually, it is definitely necessary to carry out training, take the qualification certificate or work permit. Otherwise, every chemist's test results are different. Who should I trust?

Our company is Zibo Shengkang Electric Co., Ltd., which produces laboratory analysis instruments.