How to buy an economical UV-Vis spectrophotometer

An important consideration in purchasing laboratory instruments such as spectrophotometers is the cost-effectiveness of the instrument, that is, whether it is very cost-effective
.

So how to achieve the economy of UV-Vis spectrophotometer? 1.
The content of economy The economy of UV-Vis spectrophotometer means that the instrument should be of high quality and low price
.

In daily work, I often hear someone say that an imported UV-Vis spectrophotometer is very good when comparing imported instruments with domestic instruments, how high is its photometric accuracy, how small is stray light and photometric noise, how high is its degree of automation, How strong is the applicability, etc.
, but not the price of that instrument
.

An instrument with excellent performance is a good instrument, but the technical indicators and degree of automation of those conventional and popular UV-Vis spectrophotometers are not very high
.

When comparing instruments, you can't just compare the quality indicators, not the price
.

The quality of the advanced PE company's Lambda900 UV-Vis spectrophotometer and the Varian company's Cary6000 UV-Vis spectrophotometer costing US$100,000 (complete with accessories), and the TU of China's 60,000-70,000 RMB The quality of -1901 UV-Vis spectrophotometer is compared, and the quality of a UV-Vis spectrophotometer of several hundred thousand yuan is compared with the quality of a 751 UV-visible spectrophotometer of more than 10,000 yuan in China
.

When comparing instruments, it is necessary to start from the actual work needs, not only to compare the quality, but also to compare the price
.

　　2.
Economic evaluation When comparing two instruments of the same kind, they should compare their performance-price ratio, function-price ratio, and quality-price ratio
.

Economy should refer to the economy
.

When comparing the pros and cons of UV-Vis spectrophotometers, a variety of factors should be considered, mainly from the following four aspects
.

　　1.
Performance (technical indicators) The price is better than the technical indicators of a UV-Vis spectrophotometer, and the price is cheap.
It is said that it has a high performance-price ratio and is a good instrument
.

A UV-Vis spectrophotometer with poor technical specifications cannot be used, no matter how cheap it is, it is useless, and by no means a good instrument
.

If a UV-Vis spectrophotometer has good technical indicators, it is expensive and not cost-effective, and it may not be a "good instrument" that users need
.

　　2.
The functional price is more complete than an instrument, the degree of automation is high, and the price is cheap.
It is said that its function and price are relatively high, and it is a good instrument; if an instrument has a low degree of automation, it is very difficult to rely on manual operation.
It is convenient and difficult to ensure the reliability of the instrument's working state and analysis and test results.
Even if the price of this instrument is very cheap, it cannot be said to be a good instrument
.

　　3.
The cost of use is lower than the cost of use and maintenance, which is also an important part of evaluating the economy of the instrument
.

Considering the daily maintenance and consumption costs of the instrument, the cost of making a sample is too high, which is obviously not cost-effective
.

The maintenance fee is too high, which is detrimental to regular maintenance and guaranteeing the normal operation of the instrument
.

　　4.
The quality-price ratio of the instrument When comparing the quality of two UV-visible spectrophotometers of the same type, the quality of them should be looked at first
.

If one of the two instruments, the price is very cheap and the quality is good, that is, the quality-price ratio is high
.

And another instrument is also of good quality, but expensive, that is, the quality-price ratio is low, and of course the high-quality-price ratio is better
.

Conversely, if the quality of an instrument is not good, but its price is very cheap, that is, the quality-price ratio is not high; and the quality of another instrument is good, but its price is not cheap, that is, the quality-price ratio is not high, of course.
Good quality instruments are good
.

　　Therefore, when evaluating or selecting a UV-Vis spectrophotometer, all factors must be considered comprehensively
.

In a word, good quality and cheap price
.

To compare prices with the same quality, compare the quality with the same price, and consider the economy
.