What should I pay attention to when purchasing analytical instruments?

The selection of analytical instruments is very important for the requirements of the experiment and other aspects of the user unit, and is directly related to the interests of the company. Generally, users can choose according to the following points:

1. Order according to the needs of enterprise products

According to the needs of the enterprise's products, the purpose of purchasing instruments is to ensure that the quality of the enterprise's own products is under control, so the adaptability of the instrument to the enterprise's products should be emphasized. For example, the furnace test should be as fast as possible, the incoming material inspection should be able to print the test report, and the finished product inspection should take into account the authority of the instrument. The professional requirements of the production units of single products such as steel and wire rope can be appropriately reduced, while enterprises such as casting copper alloys, aluminum alloys, and stainless steel should pay special attention to the professionalism of the instrument. Generally speaking, the test of highly professional instruments is more precise.

2. Choose products with stable quality and timely service

In terms of instrument quality, price and service, the main consideration is the service capability of the instrument supplier. Currently, the quality of high-end products such as large direct-reading spectrometers by famous foreign companies is better than that of domestic products, and the prices are not comparable. The quality and performance of domestic mid-range instruments are mostly similar, with slight differences in functions.

3. Order according to the size of the enterprise

According to the scale of the enterprise, the demand for instruments is generally divided into three categories: large, medium and small. Large enterprises can generally be equipped with high-frequency infrared carbon and sulfur analyzers and direct reading spectrometers. The cost of the laboratory can be controlled at about 1 million yuan. For enterprises with relatively simple conditions and temporarily poor economy, they can consider configuring non-aqueous carbon and sulfur analyzers, 721-type spectrophotometers, and domestic analytical balances to prepare for the construction of laboratories. The total price of preparing for the construction of a 15-square-meter laboratory is less than 10,000 yuan. For most of the domestic enterprises in my country, they must not only meet the needs of quality control, but also make the tests timely and accurate. They can configure a gas volumetric carbon and sulfur high-speed analyzer with a high degree of automation and a microcomputer element analyzer. The cost of the entire laboratory is between 15,000 and 18,000 yuan. If non-ferrous metal manufacturers do not need to determine the content of carbon and sulfur elements, they only need to purchase a microcomputer multi-element analyzer and a weighing balance, plus all chemical glassware and a full set of chemical reagents, and the total price is about 10,000 yuan.

4. Choose products with reasonable prices

Generally speaking, the service quality of manufacturers is better than that of merchants. The service of sales outlets is more timely, but it also depends on the public service of each manufacturer to the society. The content of the commitment, especially the maintenance of the instrument outside the warranty period and the supply of spare parts and consumables.