GB/T 5526-2024動(dòng)植物油脂相對(duì)密度的測(cè)定

ICS

67.200.10

CCS

X14

中華人民共和國(guó)國(guó)家標(biāo)準(zhǔn)

GB/T5526—2024

代替GB/T5526—1985

動(dòng)植物油脂相對(duì)密度的測(cè)定

Animalandvegetablefatsandoils—Determinationofrelativedensity

2024-10-26發(fā)布2025-05-01實(shí)施

國(guó)家市場(chǎng)監(jiān)督管理總局發(fā)布

國(guó)家標(biāo)準(zhǔn)化管理委員會(huì)

GB/T5526—2024

目次

前言

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Ⅲ

1

范圍

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2

規(guī)范性引用文件

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3

術(shù)語(yǔ)和定義

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4

數(shù)字密度計(jì)法（第一法）

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4.1

原理

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4.2

儀器

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4.3

步驟

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4.4

計(jì)算

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4.5

精密度

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5

相對(duì)密度計(jì)（比重計(jì)）法（第二法）

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5.1

原理

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5.2

儀器

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5.3

步驟

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5.4

計(jì)算

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5.5

精密度

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6

密度瓶法（第三法）

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6.1

原理

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6.2

儀器

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6.3

步驟

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6.4

計(jì)算

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6.5

精密度

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7

密度計(jì)法（第四法）

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7.1

原理

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7.2

儀器

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7.3

步驟

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7.4

計(jì)算

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7.5

精密度

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5

附錄A（資料性）

純水密度

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6

Ⅰ

GB/T5526—2024

前言

本文件按照GB/T1.1—2020《標(biāo)準(zhǔn)化工作導(dǎo)則第1部分：標(biāo)準(zhǔn)化文件的結(jié)構(gòu)和起草規(guī)則》的規(guī)

定起草。

本文件代替GB/T5526—1985《植物油脂檢驗(yàn)比重測(cè)定法》，與GB/T5526—1985相比，除結(jié)

構(gòu)調(diào)整和編輯性改動(dòng)外，主要技術(shù)變化如下：

—更改了文件的適用范圍（見(jiàn)第1章，1985年版的第1章）；

—增加了數(shù)字密度計(jì)法作為第一法（見(jiàn)第4章），密度計(jì)法作為第四法（見(jiàn)第7章）；

—增加了原理（見(jiàn)5.1和6.1）；

—?jiǎng)h除了“試劑”（見(jiàn)1985年版的1.2和2.2）；

—更改了部分操作步驟（見(jiàn)5.3和6.3，1985年版的1.3和2.3）；

—更改了計(jì)算方法和計(jì)算公式（見(jiàn)5.4和6.4，1985年版的1.4和2.4）；

—?jiǎng)h除了液體比重天平法的雙試驗(yàn)結(jié)果允許差（見(jiàn)1985年版的1.4）；

—增加了相對(duì)密度計(jì)（比重計(jì)）法和密度瓶法的精密度要求（見(jiàn)5.5和6.5）。

請(qǐng)注意本文件的某些內(nèi)容可能涉及專利。本文件的發(fā)布機(jī)構(gòu)不承擔(dān)識(shí)別專利的責(zé)任。

本文件由國(guó)家糧食和物資儲(chǔ)備局提出。

本文件由全國(guó)糧油標(biāo)準(zhǔn)化技術(shù)委員會(huì)（SAC/TC270）歸口。

本文件起草單位：安徽省糧油產(chǎn)品質(zhì)量監(jiān)督檢測(cè)站、國(guó)家糧食和物資儲(chǔ)備局標(biāo)準(zhǔn)質(zhì)量中心、天津市

食品安全檢測(cè)技術(shù)研究院、廣西壯族自治區(qū)糧油質(zhì)量檢驗(yàn)中心、合肥市食品藥品檢驗(yàn)中心、遼寧省糧食

和物資儲(chǔ)備事務(wù)服務(wù)中心、江蘇省糧油質(zhì)量監(jiān)測(cè)中心、山東省糧油檢測(cè)中心、湖北省糧油食品質(zhì)量監(jiān)督

檢測(cè)中心、昆明市糧油飼料產(chǎn)品質(zhì)量檢驗(yàn)中心、陜西省糧食質(zhì)量安全中心、寧夏回族自治區(qū)糧油產(chǎn)品質(zhì)

量檢測(cè)中心、中儲(chǔ)糧鎮(zhèn)江質(zhì)檢中心有限公司、中糧糧油工業(yè)（巢湖）有限公司、益海嘉里金龍魚(yú)糧油食

品股份有限公司、上?？泼Z油食品質(zhì)量檢測(cè)有限公司、安徽省公眾檢驗(yàn)研究院有限公司、中糧黃海糧

油工業(yè)（山東）有限公司、滁州市糧油質(zhì)量檢測(cè)服務(wù)中心。

本文件主要起草人：胡斌、徐廣超、李旭、李永發(fā)、張黎利、梅寒、伍先紹、秦紹剛、范藝凡、黃偉、

毛永榮、任凌云、王瑞杰、倪姍姍、劉利、張繼光、夏輝、張麗、張榴萍、潘坤、趙仕峰、郁海菲、

徐彥輝、盧偉東、劉樹(shù)彤。

本文件及其所代替文件的歷次版本發(fā)布情況為：

—1985年首次發(fā)布為GB/T5526—1985；

—本次為第一次修訂。

Ⅲ

GB/T5526—2024

動(dòng)植物油脂相對(duì)密度的測(cè)定

1范圍

本文件描述了動(dòng)植物油脂相對(duì)密度測(cè)定的數(shù)字密度計(jì)法、相對(duì)密度計(jì)（比重計(jì)）法、密度瓶法和密

度計(jì)法。

本文件適用于動(dòng)植物油脂相對(duì)密度的測(cè)定。其中，第一法適用于液態(tài)、半固態(tài)動(dòng)植物油脂相對(duì)密度

的測(cè)定；第二法、第三法、第四法適用于液態(tài)動(dòng)植物油脂相對(duì)密度的測(cè)定。

2規(guī)范性引用文件

本文件沒(méi)有規(guī)范性引用文件。

3術(shù)語(yǔ)和定義

本文件沒(méi)有需要界定的術(shù)語(yǔ)和定義。

4數(shù)字密度計(jì)法（第一法）

4.1原理

采用U形管振蕩法，將試樣導(dǎo)入一端固定的U形管，利用激發(fā)裝置使U形管以一定的特征頻率振

蕩。該振蕩頻率二次方的大小與U形管中試樣的密度或相對(duì)密度呈線性關(guān)系。

4.2儀器

數(shù)字密度計(jì)應(yīng)具有自動(dòng)黏度修正及溫度熱平衡功能，準(zhǔn)確度應(yīng)符合：

—溫度：（0±0.05）℃～（100±0.05）℃；

—相對(duì)密度：（0±0.0001）～（3±0.0001）。

如采用自動(dòng)進(jìn)樣器，在檢測(cè)溫度范圍內(nèi)樣品的黏度不大于