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Method for measuring storage temperature range of grapes

A technology of storage temperature and measurement method, which is applied to the field of ice temperature and micro-freezing preservation of fruits, and can solve the problems of only being able to measure

Inactive Publication Date: 2012-07-25
SHANGHAI ZHONGHE TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the traditional ice-salt water bath method can only measure the freezing point of fruit juice after squeezing the fruit juice, the present invention provides a simple, fast and sensitive method for measuring the freezing point and supercooling point of grapes

Method used

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Embodiment Construction

[0047] In order to illustrate the content of the invention more clearly, the present invention will be described below in conjunction with the examples.

[0048] ① Turn on the refrigerator and keep the temperature stable at -18°C;

[0049] ② Purchasing grapes from the market with plump fruit, fresh, bright color, consistent maturity, no pests, no mechanical damage, no mildew, no frost damage as experimental raw materials;

[0050]③ The grapes are divided into 6 groups according to the size, each group has 9 pieces;

[0051] ④ Before the measurement, put the T-type thermocouple into the low-temperature constant temperature bath for calibration, and use the national secondary mercury thermometer to calibrate the thermocouple, and the temperature calibration range is -20~20°C;

[0052] ⑤ Connect thermocouple, data acquisition instrument Fluke-NetDAQ32 and computer in order;

[0053] ⑥ Take out one grape from each group, and use the vernier caliper and soft ruler to measure the ...

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Abstract

The invention discloses a method for measuring a storage temperature range of grapes. The method comprises buying superior-grade grapes, selecting, sorting, and determining a geometric center of the grapes; marking a temperature testing thermocouple; arranging the thermocouple at the geometric center; connecting the thermocouple Fluke-NetDAQ32 data acquisition instrument with a computer; powering on the computer and the data acquisition Fluke-NetDAQ32; putting the grapes fixed with the thermocouple in a refrigerating chamber of a refrigerator; recording the temperature change every 0.5-1s; drawing a temperature dropping curve according to the acquired temperature data so as to determine an ice point and an overcooling point; and finally determining the overcooling storage of the grapes within the temperature between the ice point and the overcooling point. The testing method has the beneficial effects of being simple, convenient and rapid to operate and high in accuracy.

Description

technical field [0001] The invention relates to the field of ice-temperature and slightly-frozen preservation of fruits, in particular to the field of ice-temperature and slightly-frozen preservation of grapes, and is a method for measuring the storage temperature of grapes. [0002] Background technique [0003] Type the technical field description paragraph here. Grapes, Vitis deciduous vines, palmate leaves, 3-5 gaps, compound racemes, usually conical, berries are mostly round or oval, and the color varies with the variety. Humans began to cultivate this fruit tree a long time ago, accounting for almost a quarter of the world's fruit production; it has high nutritional value and can be made into grape juice, raisins and wine. Eurasian grapes with large grains, thick skin, less juice, high quality, difficult to separate the skin and flesh, and good storage and transportation are also called raisins. [0004] At present, most fruits in China adopt the method of low-tempe...

Claims

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Application Information

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IPC IPC(8): G01N25/12
Inventor 施海宁王金伟王永红刘宁
Owner SHANGHAI ZHONGHE TRADE
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