GB/T 5526-2024動植物油脂相對密度的測定

ICS

67.200.10

CCS

X14

中華人民共和國國家標準

GB/T5526—2024

代替GB/T5526—1985

動植物油脂相對密度的測定

Animalandvegetablefatsandoils—Determinationofrelativedensity

2024-10-26發(fā)布2025-05-01實施

國家市場監(jiān)督管理總局發(fā)布

國家標準化管理委員會

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

術語和定義

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4

數(shù)字密度計法（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

計算

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4.5

精密度

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5

相對密度計（比重計）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

計算

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6.5

精密度

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7

密度計法（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《標準化工作導則第1部分：標準化文件的結構和起草規(guī)則》的規(guī)

定起草。

本文件代替GB/T5526—1985《植物油脂檢驗比重測定法》，與GB/T5526—1985相比，除結

構調整和編輯性改動外，主要技術變化如下：

—更改了文件的適用范圍（見第1章，1985年版的第1章）；

—增加了數(shù)字密度計法作為第一法（見第4章），密度計法作為第四法（見第7章）；

—增加了原理（見5.1和6.1）；

—刪除了“試劑”（見1985年版的1.2和2.2）；

—更改了部分操作步驟（見5.3和6.3，1985年版的1.3和2.3）；

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

—刪除了液體比重天平法的雙試驗結果允許差（見1985年版的1.4）；

—增加了相對密度計（比重計）法和密度瓶法的精密度要求（見5.5和6.5）。

請注意本文件的某些內容可能涉及專利。本文件的發(fā)布機構不承擔識別專利的責任。

本文件由國家糧食和物資儲備局提出。

本文件由全國糧油標準化技術委員會（SAC/TC270）歸口。

本文件起草單位：安徽省糧油產品質量監(jiān)督檢測站、國家糧食和物資儲備局標準質量中心、天津市

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

和物資儲備事務服務中心、江蘇省糧油質量監(jiān)測中心、山東省糧油檢測中心、湖北省糧油食品質量監(jiān)督

檢測中心、昆明市糧油飼料產品質量檢驗中心、陜西省糧食質量安全中心、寧夏回族自治區(qū)糧油產品質

量檢測中心、中儲糧鎮(zhèn)江質檢中心有限公司、中糧糧油工業(yè)（巢湖）有限公司、益海嘉里金龍魚糧油食

品股份有限公司、上海科茂糧油食品質量檢測有限公司、安徽省公眾檢驗研究院有限公司、中糧黃海糧

油工業(yè)（山東）有限公司、滁州市糧油質量檢測服務中心。

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

動植物油脂相對密度的測定

1范圍

本文件描述了動植物油脂相對密度測定的數(shù)字密度計法、相對密度計（比重計）法、密度瓶法和密

度計法。

本文件適用于動植物油脂相對密度的測定。其中，第一法適用于液態(tài)、半固態(tài)動植物油脂相對密度

的測定；第二法、第三法、第四法適用于液態(tài)動植物油脂相對密度的測定。

2規(guī)范性引用文件

本文件沒有規(guī)范性引用文件。

3術語和定義

本文件沒有需要界定的術語和定義。

4數(shù)字密度計法（第一法）

4.1原理

采用U形管振蕩法，將試樣導入一端固定的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密度呈線性關系。

4.2儀器

數(shù)字密度計應具有自動黏度修正及溫度熱平衡功能，準確度應符合：

—溫度：（0±0.05）℃～（100±0.05）℃；

—相對密度：（0±0.0001）～（3±0.0001）。

如采用自動進樣器，在檢測溫度范圍內樣品的黏度不大于