Beijing Haotianhui Instrument Co., Ltd. (hereinafter referred to as "Haotianhui") is a high-tech manufacturing enterprise that integrates scientific research, development, production, sales, and service of specialized spectral analysis instruments and related main accessories and supporting instruments. It was founded by Professor Wu Tingzhao in 1987, and its main products are concentrated in the atomic absorption industry. The company has obtained ISO-9001 quality management system certification. The total area of the production base is over 10000 square meters, with nearly 200 employees, including more than 30 personnel holding senior technical titles, 3 doctors, and 8 senior industry consultants. The instrument products have a complete range of grades and are suitable for various types of users. The main products include atomic absorption spectrophotometer, atomic fluorescence spectrophotometer, UV visible spectrophotometer, flow injection hydride generator, Wu's metal sleeve glass high-efficiency atomizer, etc. With the continuous innovation of technology, the continuous improvement of quality, and the continuous strengthening of after-sales service, our instruments have been exported overseas in recent years, to some countries and regions in the Americas, Africa, Australia, and Southeast Asia. Our goal is to climb our detection technology to new heights through our unremitting efforts. Haotianhui Instrument has developed and produced the CAAM-2001 multifunctional atomic absorption spectrophotometer, which mainly uses flame atomic absorption analysis method, and also has multiple functions such as flow injection hydride atomic absorption method (with built-in flow injection hydride generator), flame emission method, visible/ultraviolet solution molecular absorption method, flow injection online enrichment method, etc. It is a large precision analytical instrument with multiple functions and excellent comprehensive performance among similar instruments, and adopts advanced technology. With experience in developing various types of instruments, we have integrated the best experience of many instruments into one and improved the element testing sensitivity of the atomic absorption spectrophotometer to a new level, achieving a good level of flame atomic absorption sensitivity, that is, 1 μ g/ml/Cu absorbance ≥ 0.3 (sensitivity<0.015 μ g/ml/1% A). Haotianhui Instrument's Wu's metal sleeve glass high-efficiency atomizer is a key component for atomic absorption manufacturers and can be used as a matching tool for import and export atomic absorption. The invention, production, and use of Wu's metal sheathed glass high-efficiency atomizer have improved the sensitivity, detection limit, and stability of atomic absorption. The WHG-102A flow injection hydride generator produced by our company, invented and developed by Professor Wu Tingzhao, has taken the application of hydride atomic absorption spectroscopy to a new level using technology. The detection process of hydride atomic absorption spectroscopy requires nitrogen or argon gas to carry the generated hydride to a quartz tube for atomization, in order to determine the eight trace elements that can generate hydrides: arsenic, tin, selenium, antimony, bismuth, and germanium Determination of mercury by lead, tellurium, and atomic absorption method. Haotianhui Instrument provides users with application methods and technical consulting services. We have a good after-sales service system and can solve various problems of instruments for users at any time.