CN105092407A - Husked rice yield and head rice rate continuous measuring method for rice - Google Patents

Husked rice yield and head rice rate continuous measuring method for rice Download PDF

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Publication number
CN105092407A
CN105092407A CN201510473532.1A CN201510473532A CN105092407A CN 105092407 A CN105092407 A CN 105092407A CN 201510473532 A CN201510473532 A CN 201510473532A CN 105092407 A CN105092407 A CN 105092407A
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rice
sample
brown rice
paddy
quality
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刘光亚
朱启思
邓常继
朱丽琼
关则恳
曾彩虹
江华邦
吴秋婷
谢宇霞
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Guangdong Institute Of Grain Science
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Guangdong Institute Of Grain Science
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Abstract

The invention discloses a husked rice yield and head rice rate continuous measuring method for rice. The method includes the steps that firstly, a clean rice sample is prepared; secondly, the clean rice sample is processed, wherein the clean rice sample with the mass being m0 is weighed to serve as a test sample, husked rice, with the mass being m1, in paddy, sprouted kernels and a test sample to be husked are sorted, sprouted kernel husked rice is obtained after the sprouted kernels are husked, a husked rice sample is obtained after the test sample to be husked is husked, incompletely husked rice and completely husked rice with the mass being m3 are sorted from the husked rice sample, and the sprouted kernel husked rice is mixed with the incompletely husked rice to obtain an incompletely husked rice gross sample with the mass being m2; thirdly, the completely husked rice and the husked rice in paddy are mixed and ground, and after bran powder is removed, all head rice with the mass being m4 is sorted; fourthly, the husked rice yield X and the head rice rate H of the rice are respectively calculated, X satisfies the formula that X=(m2/2+m3)/(m0-m1)*100%, and H satisfies the formula that H=m4/m0*100%. The method has the advantages of being few in detection step and high in detection efficiency and accuracy.

Description

A kind of unfinished rice production rate o paddy and head rice rate method for continuously measuring
Technical field
The present invention relates to and belong to rice quality detection technique field, be specifically related to a kind of brown rice yield of METHOD FOR CONTINUOUS DETERMINATION paddy and the method for head rice rate.
Background technology
Grain is the basis of human survival and development.China always puts Food Security in the first place, and being full of real depending on granary is flourishing age scene.The No.1 Central File that the beginning of the year is issued emphasizes lift grain safety again, Ensuring Food Safety meaning great self-evident.So-called grain security, can guarantee that all people at any time not only can buy but also afford the basic foodstuff needed for them exactly, should the amount of guarantor also will guarantee the quality.But there is seasonal, undulatory property in grain-production, easily affects greatly by natural cause, perennially runing counter to continuity of this and grain.Want to guarantee long-term consumption, regulate supplies, solve disparities between supply and demand, must certain grain reserves be carried out.China has established central and local governments' two-stage deposit system, and issues files such as " grain qualities supervision implementing method (trying) ", requires stored grain at different levels should carry out grain and go out to put in storage rules for testing quality, ensures out warehouse-in grain quality safety.
Paddy one of to be stored up grain as China is most important, and it goes out ware-house-in inspection and should carry out according to GB1350-2009, and wherein brown rice yield and head rice rate are most important two indexs of reflection rice quality, is the paddy foundation of determining the price such as fixed.Brown rice (wherein unsound grain quality calculate by half) after brown rice yield refers to the shelling of clean paddy sample accounts for the massfraction of sample, expression be the ratio of edible portion in paddy; When head milled rice refers to that brown rice is national standard three grades of rice through being milled into machining precision, length reaches the massfraction that complete grain of rice average length 3/4ths and the above grain of rice account for clean paddy sample, reflection be the ratio that paddy can be processed into whole grain rice product.According to the method for inspection specified in GB/T5495-2008, GB/T21719-2008, brown rice yield and head rice rate must sample respectively, process, detect and calculate, and cause that the flow process of quality determination is loaded down with trivial details, efficiency is low, wasting time and energy very, are therefore necessary to improve.
Summary of the invention
The object of the invention is to propose a kind of unfinished rice production rate o paddy and head rice rate method for continuously measuring, it has that detecting step is few, checkability and the high feature of accuracy, can instruct the purchase of rice processing factory and rice storage enterprise, storage and processing work effectively, fast.
Object of the present invention realizes by following technical scheme:
A kind of unfinished rice production rate o paddy and head rice rate method for continuously measuring, is characterized in that comprising the following steps:
Step 1, clean rice sample preparation.
The method specified by existing standard claims rice sample, and measure after removing impurity and regulate the moisture of rice sample in specialized range, obtain clean rice sample, wherein: long-grain nonglutinous rice moisture controls 12.5% ~ 14.5%, paddy controls 13.5% ~ 15.5% japonica rice.
The process of step 2, clean rice sample.
(2.1) taking quality is m 0clean rice sample as test sample, the outer brown rice of paddy in test sample and sprouted kernel are sorted out and deposited respectively, and remaining test sample is sample for shelling, weighs the quality (m of the outer brown rice of paddy 1).
(2.2) class brown rice of sprouting is obtained after all being peeled off separately by the sprouted kernel in step 2.1.
(2.3) the sample experiment hulling machine for shelling in step 2.1 is shelled, sort out and do not put into hulling machine by the paddy shelled in sample for shelling and again shell, still unhulled paddy kernel adopts manual shelling, until sample for shelling all shells, obtains brown rice sample.
(2.4) from the brown rice sample of step 2.3, unsound grain brown rice whole in brown rice sample is chosen in organoleptic examination, obtains unsound grain shelling class brown rice and perfect grain shelling class brown rice respectively.
(2.5) the unsound grain shelling class brown rice of sprout class brown rice and the step 2.4 of blend step 2.2, obtains unsound grain brown rice bulk sample.
(2.6) quality (m of the unsound grain brown rice bulk sample of step 2.5 is weighed respectively 2) and the perfect grain shelling class brown rice quality (m of step 2.4 3).
Step 3, the outer brown rice mixing of paddy of the perfect grain of step 2.4 shelling class brown rice and step 2.1 to be placed in experiment rice mill, to be milled into machining precision and to be up to state standards the rice of three grades, after removing chaff powder, sort out whole head milled rice and weigh quality (m 4).
Step 4, the brown rice yield X calculating paddy respectively and head rice rate H.
Described unfinished rice production rate o paddy X=(m 2/ 2+m 3)/(m 0-m 1) × 100%.
Described Whole White Rice Percentage Dynamic H=m 4/ m 0× 100%.
Wherein: m 0for the test specimens quality in step 2.
M 1for the quality of the outer brown rice of step 2 two-story valley.
M 2for the quality of unsound grain brown rice in step 2.
M 3for improving the quality of grain shelling class brown rice in step 2.
M4 is the quality of whole head milled rice in step 3.
Prioritization scheme, regulates the moisture method of rice sample to be in step 1: the moisture of rice sample requires higher than regulation, use baking oven at 50 ~ 60 DEG C low temperature drying to specifying requirement; The moisture of rice sample requires lower than regulation, rice sample to be placed in climatic chamber humidification to specialized range.
The present invention has following outstanding substantive distinguishing features and significant progress: the present invention adopts same sample sequentially determining unfinished rice production rate o paddy and head rice rate, save proving time, greatly increasing checkability, going out for holding stored grain, storage quality close strong foundation is provided.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1
A kind of unfinished rice production rate o paddy and head rice rate method for continuously measuring, it comprises the following steps:
Step 1, clean rice sample preparation.
Respectively from long grain type long-grain nonglutinous rice sample, 55g is taken as 3 kinds of rice samples in middle long grain type long-grain nonglutinous rice sample and short grain type long-grain nonglutinous rice sample, the method specified by GB/T5494 removes the impurity in 3 kinds of rice samples, when removing impurity, should note distinguishing ghost and shrivelled kernel, ghost is that impurity must be removed, shrivelled kernel is that unsound grain should retain, then measure and regulate the moisture (weight content) of 3 kinds of rice samples, GB/T21719-2008 regulation long-grain nonglutinous rice sample moisture scope is 12.5 ~ 14.5%, moisture is higher than afore mentioned rules scope, use baking oven at 50 ~ 60 DEG C low temperature drying to specialized range, rice sample lower than afore mentioned rules scope, is placed on humidification in climatic chamber, the moisture of rice sample is adjusted to specialized range, obtain 3 kinds of clean rice samples by moisture.
The process of step 2, clean rice sample.
Step 2.1, in 3 kinds of clean rice samples, take quality m 0be that 26 ± 0.05g is as test sample, often kind of clean rice sample adopts 2 points of test samples to carry out 2 groups of parallel testings, 3 kinds of clean rice samples totally 6 parts of test samples, 6 parts of test sample correspondence markings are that Xian is long by 1, Xian is long by 2, long by 2 in long by 1 in Xian, Xian, Xian short 1 and Xian is short by 2, outer for paddy in test sample brown rice and sprouted kernel are sorted out and deposited respectively, remaining test sample is sample for shelling, weighs the quality m of the outer brown rice of paddy 1, m 1value is in table 1.
Step 2.2, the sprouted kernel in step 2.1 is all peeled off separately after obtain class brown rice of sprouting.
Step 2.3, the sample experiment hulling machine for shelling in step 2.1 to be shelled, sort out and do not put into hulling machine by the paddy shelled in sample for shelling and again shell, still unhulled paddy kernel adopts manual shelling, until sample for shelling all shells, obtains brown rice sample.
Step 2.4, from the brown rice sample of step 2.3 organoleptic examination choose unsound grain brown rice whole in brown rice sample, obtain unsound grain shelling class brown rice and perfect grain shelling class brown rice respectively.
The unsound grain shelling class brown rice of sprout class brown rice and the step 2.4 of step 2.5, blend step 2.2, obtains unsound grain brown rice bulk sample.
The quality m of step 2.6, respectively the unsound grain brown rice bulk sample of weighing step 2.5 2with the perfect grain shelling class brown rice quality m of step 2.4 3, m 2and m 3value is in table 1.
Step 3, the outer brown rice mixing of paddy of the perfect grain of step 2.4 shelling class brown rice and step 2.1 to be placed in experiment rice mill, to be milled into machining precision and to be up to state standards the rice of three grades, after removing chaff powder, sort out whole head milled rice and weigh quality m 4(see table 1).
Step 4, the brown rice yield X calculating each working sample respectively and head rice rate H, the results are shown in Table 1.
Unfinished rice production rate o paddy X=(m 1/ 2+m 2)/m 0× 100%.
Whole White Rice Percentage Dynamic H=m 3/ m 0× 100%.
Wherein: m 0for the test specimens quality in step 2.
M 1for the quality of the outer brown rice of step 2 two-story valley.
M 2for the quality of unsound grain brown rice in step 2.
M 3for improving the quality of grain shelling class brown rice in step 2.
M4 is the quality of whole head milled rice in step 3.
The mean value of row test findings of making even again, correspondence calculates brown rice yield X and the head rice rate H of 3 kinds of rice samples, the results are shown in Table 2.
According to the measurement result of table 1, the brown rice yield of 2 groups of replicate determinations of same rice sample in the present embodiment and head rice rate are compared and analyze, compares with analysis result in table 3.
From table 3, brown rice yield and the head rice rate of 2 groups of replicate determinations of same rice sample in the present embodiment are proportionate, the quality of what brown rice yield and head rice rate confirmed mutually indicate the present embodiment rice sample, has the feature that efficiency is high and accuracy is high that rice quality detects.
Embodiment 2
The unfinished rice production rate o paddy of the present embodiment and the difference of head rice rate method for continuously measuring and embodiment 1 are:
Step 1, from round-grained rice rice sample, take 55g as rice sample, after removing impurity, measure and regulate the moisture (weight content) of round-grained rice rice sample, GB/T21719-2008 regulation japonica rice paddy sample moisture scope is 13.5 ~ 15.5%, obtains clean rice sample.
Step 2.1 in step 2, in clean rice sample, take quality m 0be that 26 ± 0.02g is as test sample, clean rice sample adopts 2 parts of test samples to carry out 2 groups of parallel testings, 2 parts of test sample correspondence markings are japonica rice 1 and japonica rice 2, outer for paddy in test sample brown rice and sprouted kernel are sorted out and deposited respectively, remaining test sample is sample for shelling, weighs the quality m of the outer brown rice of paddy 1, m 1value is in table 4.
Continue the step 2.2 of reference embodiment 1 to step 4, the quality m of unsound grain brown rice bulk sample in the present embodiment 2, improve grain shelling class brown rice quality m 3with head milled rice quality m 4value in table 4, calculate brown rice yield X and the head rice rate H of 2 working samples of the present embodiment respectively, in table 4, then the mean value of row test findings of making even, calculate brown rice yield X and the head rice rate H of the round-grained rice rice sample of the present embodiment, the results are shown in Table 5.
According to the measurement result of table 4, the brown rice yield of 2 of the rice sample of the present embodiment groups of replicate determinations and head rice rate are compared and analyze, compares with analysis result in table 6.
From table 6, brown rice yield and the head rice rate of 2 groups of replicate determinations of the present embodiment intermediate keng rice paddy sample are proportionate, the quality of what brown rice yield and head rice rate confirmed mutually indicate the present embodiment rice sample, improve efficiency and accuracy that rice quality detects.
Comparative example 1
This comparative example is using the long grain type long-grain nonglutinous rice sample in embodiment 1, middle long grain type long-grain nonglutinous rice sample and short grain type long-grain nonglutinous rice sample as mensuration sample, 3 measure sample and are labeled as long grain type comparative sample, middle long grain type comparative sample and short grain type comparative sample respectively, each rice sample carries out 2 groups of replicate determinations, often organizes parallel sample and is labeled as long contrast 2 in long contrast 1 in the long contrast of Xian 1, the long contrast of Xian 2, Xian, Xian, the short contrast of Xian 1 and the short contrast 2 of Xian.
Take above-mentioned 3 mensuration samples according to GB/T5495-2008 and detect roughness, measurement result is in table 7.
Separately take above-mentioned 3 according to GB/T21719-2008 and measure sample detection head rice rate, measurement result is in table 8.
Respectively with reference to the absolute value difference requirement about 2 independent test results in GB/T5495-2008 and GB/T21719-2008, specifically the brown rice yield absolute difference of 2 independent tests is not more than 0.5%, head rice rate absolute difference shows when being not more than 1.5% that the data of 2 independent tests are reliable, brown rice yield and the head rice rate of same long-grain nonglutinous rice sample embodiment 1 and comparative example 1 measured respectively compare, and comparative result is in table 9.
From table 9, brown rice yield absolute difference and the head rice rate absolute difference of the result that the present invention measures and national standard method result all meet data reliability requirement, explanation, the result that the present invention measures is consistent with national standard method result, the present invention specify that the inspection process of sequentially determining unfinished rice production rate o paddy and head rice rate, drastically increase checkability, the present invention has the advantages that detection efficiency is high, accuracy is high, very time saving and energy saving.
In addition, by brown rice yield and the head rice rate contrast of 2 groups of replicate determinations of same rice sample in comparative example 1, the results are shown in Table 10.
From table 10, the long grain type comparative sample of comparative example 1, the brown rice yield of middle long grain type comparative sample and head rice rate are not proportionate, brown rice yield becomes the reverse quality showing rice sample with head rice rate, show the bigger error that the assay method of GB exists, and the brown rice yield of each working sample that the present invention measures and head rice rate are proportionate, the quality of what brown rice yield and head rice rate confirmed mutually indicate rice sample, the present invention has the high feature of rice quality detection accuracy.
This comparative example 2
This comparative example, using the round-grained rice rice sample in embodiment 2 as mensuration sample, carries out 2 groups of replicate determinations, often organizes parallel sample and is labeled as japonica rice 1 and japonica rice 2.
Take said determination sample according to GB/T5495-2008 and detect roughness, measurement result is in table 11.
Separately take said determination sample according to GB/T21719-2008 and detect head rice rate, measurement result is in table 12.
Brown rice yield and the head rice rate of round-grained rice rice sample embodiment 2 and comparative example 2 measured respectively compare, and comparative result is in table 13.
From table 13, brown rice yield absolute difference and the head rice rate absolute difference of the result that the present invention measures and national standard method result all meet data reliability requirement, explanation, the result that the present invention measures is consistent with national standard method result, the present invention specify that the inspection process of sequentially determining unfinished rice production rate o paddy and head rice rate, drastically increase checkability, the present invention has the advantages that detection efficiency is high, accuracy is high, very time saving and energy saving.

Claims (2)

1. unfinished rice production rate o paddy and a head rice rate method for continuously measuring, is characterized in that comprising the following steps:
Step 1, clean rice sample preparation;
The method specified by existing standard claims rice sample, and measure after removing impurity and regulate the moisture of rice sample in specialized range, obtain clean rice sample, wherein: long-grain nonglutinous rice moisture controls 12.5% ~ 14.5%, japonica rice paddy controls 13.5% ~ 15.5%;
The process of step 2, clean rice sample;
(2.1) taking quality is m 0clean rice sample as test sample, the outer brown rice of paddy in test sample and sprouted kernel are sorted out and deposited respectively, and remaining test sample is sample for shelling, weighs the quality (m of the outer brown rice of paddy 1);
(2.2) class brown rice of sprouting is obtained after all being peeled off separately by the sprouted kernel in step 2.1;
(2.3) the sample experiment hulling machine for shelling in step 2.1 is shelled, sort out and do not put into hulling machine by the paddy shelled in sample for shelling and again shell, still unhulled paddy kernel adopts manual shelling, until sample for shelling all shells, obtains brown rice sample;
(2.4) from the brown rice sample of step 2.3, unsound grain brown rice whole in brown rice sample is chosen in organoleptic examination, obtains unsound grain shelling class brown rice and perfect grain shelling class brown rice respectively;
(2.5) the unsound grain shelling class brown rice of sprout class brown rice and the step 2.4 of blend step 2.2, obtains unsound grain brown rice bulk sample;
(2.6) quality (m of the unsound grain brown rice bulk sample of step 2.5 is weighed respectively 2) and the perfect grain shelling class brown rice quality (m of step 2.4 3);
Step 3, the outer brown rice mixing of paddy of the perfect grain of step 2.4 shelling class brown rice and step 2.1 to be placed in experiment rice mill, to be milled into machining precision and to be up to state standards the rice of three grades, after removing chaff powder, sort out whole head milled rice and weigh quality (m 4);
Step 4, the brown rice yield X calculating paddy respectively and head rice rate H;
Described unfinished rice production rate o paddy X=(m 2/ 2+m 3)/(m 0-m 1) × 100%;
Described Whole White Rice Percentage Dynamic H=m 4/ m 0× 100%; Wherein: m 0for the test specimens quality in step 2;
M 1for the quality of the outer brown rice of step 2 two-story valley;
M 2for the quality of unsound grain brown rice in step 2;
M 3for improving the quality of grain shelling class brown rice in step 2;
M4 is the quality of whole head milled rice in step 3.
2. unfinished rice production rate o paddy according to claim 1 and head rice rate method for continuously measuring, it is characterized in that the moisture method regulating rice sample in step 1 is: the moisture of rice sample requires higher than regulation, use baking oven at 50 ~ 60 DEG C low temperature drying to specifying requirement; The moisture of rice sample requires lower than regulation, rice sample to be placed in climatic chamber humidification to specialized range.
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CN109569770A (en) * 2018-10-22 2019-04-05 盐城市必新米业有限公司 Drying domestic rice processing technology
CN113426709A (en) * 2021-07-21 2021-09-24 长沙荣业软件有限公司 Intelligent detection robot for grain material purchase and grain material classification method
CN115069329A (en) * 2022-06-14 2022-09-20 广西壮族自治区农业科学院 Method for selecting whole rice rate of low-generation rice
CN115684510A (en) * 2023-01-04 2023-02-03 中储粮成都储藏研究院有限公司 Grain intelligent sampling inspection method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109569770A (en) * 2018-10-22 2019-04-05 盐城市必新米业有限公司 Drying domestic rice processing technology
CN113426709A (en) * 2021-07-21 2021-09-24 长沙荣业软件有限公司 Intelligent detection robot for grain material purchase and grain material classification method
CN115069329A (en) * 2022-06-14 2022-09-20 广西壮族自治区农业科学院 Method for selecting whole rice rate of low-generation rice
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Application publication date: 20151125