The effect of Agtron Spectral Analyzer on the Measurement of Coffee Bean Cup, the advantages and disadvantages of Spectral Analyzer

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One of the application skills of Agtron (near-infrared caramel spectrum analyzer): the monitoring and application of Roast Delta value.

Is your Agtron only used to measure the roasting degree of coffee products? Did you know that this is only half of its function? In fact, in addition to measuring the roasting degree of coffee beans, this expensive spectrum analyzer can also tell coffee roasters another valuable information, which is the Roast Delta value of coffee beans (referred to as Rd value).

What is "Roast Delta value"? It is the "difference" between the Agtron value of your coffee beans and the grinding Agtron value. For example, if you roast a spaghetti coffee bean and put it into an Agtron analyzer within 15 minutes after the bean is cooled in the oven, and you get a value of 50.3 and 57.5, then the Roast delta value of this coffee bean is 7.2.

What is the purpose of knowing the "Roast Delta value"? It's of great use! Please keep in mind the following principles: for the same style of coffee beans with the same roasting degree, the smaller the Roast Delta value is, the more the flavor tends to be flat and the lack of three-dimensional sense and dynamic; the higher the Roast Delta value, the more vivid and dynamic the flavor is.

For example, for medium roasted espresso (Espresso) beans, the Roast Delta value must be moderate, the ideal standard Roast Delta value is 7 (plus or minus 0.5), neither too high nor too low. High or low Rd values will have a great impact on the cup performance of Espresso. The Roast Delta value of the lightly roasted single bean should be higher. For the African bean with emphasis on aroma, the ideal RD value should be more than 16. In some cases, the Roast Delta value of the shallow roasted single product coffee bean can even be as high as 25 Delta 30. The high Delta value is a three-dimensional and distinct representation of the flavor in the cup. It is emphasized that the Roast Delta value of deep-roasted coffee beans with low sweetness should be small, and the ideal value should be between 1 and 7.5.

Before baking a bean, we can set the Roast Delta value that we expect it to reach, and according to the previous baking record, we can adjust the Roast Delta value to make the final roasted coffee bean flavor performance more in line with our requirements.

Advantages of Spectral Analyzer

1. The sampling method is flexible, and the detection and analysis of rare and precious metals can save the loss caused by sampling.

two。 The testing rate is high, multi-channel instantaneous multi-point acquisition can be set, and real-time output through the calculator.

3. For some mechanical parts, non-destructive testing can be done without destroying the sample, which is convenient for non-destructive testing.

4. The analysis speed is fast, so it is more suitable for pre-furnace analysis or on-site analysis, so as to achieve rapid detection.

5. The accuracy of the analysis results is based on the standard samples of chemical analysis.

Shortcomings of Spectral Analyzer

1. It is difficult to accurately detect nonmetals and elements between metals and nonmetals.

two。 It is not the original method, it can not be used as the arbitration analysis method, and the test results can not be used as the basis of national certification.

3. Due to the relative monopoly of the products of various enterprises, the cost of purchase and maintenance is relatively high, and the performance price is relatively low.

4. A large number of representative samples are needed for chemical analysis modeling, which is obviously impractical for the detection of small batch samples.

5. The model needs to be constantly updated, and when the instrument changes or the standard sample changes, the model also changes.

6. The modeling cost is very high, and the testing cost of the three-element analyzer is relatively large. Of course, when testing a large number of samples, the testing cost will be reduced.

7. It is easy to be affected by external or internal factors such as optical system parameters, and the problem of curve nonlinearity often occurs, which has a great impact on the accuracy of the test results.

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