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GB 5009.236-2016Animal and vegetable fats and oils -- Determination of moisture and volatile matter content (English PDF)

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Issued by

National Health and Family Planning Commission of the People’s Republic of China

Level / Type

National · Mandatory

Issue date

August 31, 2016

Implementation date

March 1, 2017

Scope

GB 5009.236-2016 (Animal and vegetable fats and oils -- Determination of moisture and volatile matter content) is available as an English-translated PDF.

GB 5009.236-2016 — This Standard specifies two methods for the determination of moisture and volatile matter in animal and vegetable fats and oils. In this Standard, Method I [sand bath (electric heating plate) method] is applicable to all animal and vegetable fats and oils.

Method II (electric drying oven method) is merely applicable to non-dry fats and oils whose acid value is lower than 4 mg/g; it is not applicable to lauric acid type of oils (palm kernel oil and coconut oil). Method I -- Sand Bath (electric heating plate) Method

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Document preview — GB 5009.236-2016

National Standard of the People's Republic of China

Issued by: National Health and Family Planning Commission of the People’s Republic of China

Foreword...3
1 Scope...4
Method I -- Sand Bath (electric heating plate) Method...4
2 Principle...4
3 Instruments and Equipment...4
4 Analytical Procedures...4
5 Expression of Analytical Result...5
6 Precision...6
Method II -- Electric Drying Oven Method...6
7 Principle...6
8 Instruments and Equipment...6
9 Analytical Procedures...6
10 Expression of Analytical Result...7
11 Precision...7

Foreword

This Standard serves as a replacement of GB/T 9696-2008 Animal and Vegetable Fats

and Oils - Determination of Moisture and Volatile Matter Content; GB/T 5528-2008

Animal and Vegetable Fats and Oils - Determination of Moisture and Volatile Matter

Content.

In comparison with GB/T 9696-2008 and GB/T 5528-2008, there are certain main

changes as follows.

---The title of this Standard is modified into "National Food Safety Standard -

Animal and Vegetable Fats and Oils - Determination of Moisture and Volatile

Matter";

---This Standard combines methods in GB/T 9696-2008 and GB/T 5528-2008.

National Food Safety Standard - Animal and Vegetable

Fats and Oils - Determination of Moisture and Volatile

Matter

1 Scope

This Standard specifies two methods for the determination of moisture and volatile

matter in animal and vegetable fats and oils.

In this Standard, Method I [sand bath (electric heating plate) method] is applicable to

all animal and vegetable fats and oils. Method II (electric drying oven method) is merely

applicable to non-dry fats and oils whose acid value is lower than 4 mg/g; it is not

applicable to lauric acid type of oils (palm kernel oil and coconut oil).

Method I -- Sand Bath (electric heating plate) Method

2 Principle

Under the condition of 103 °C ± 2 °C, heat up the test sample, till moisture and volatile

matter completely dissipate.

3 Instruments and Equipment

3.1 Analytical balance. division value. 0.001 g.

3.2 Plate. flat ceramic or glass plate; diameter. 80 mm/90 mm; depth. around 30 mm.

3.4 Sand bath or electric heating plate (room temperature ~ 150 °C).

3.5 Dryer. contain effective desiccant.

4 Analytical Procedures

4.1 Sample Preparation

In a pre-dried plate, which is weighed together with the thermometer, weigh-take

around 20 g of sample, accurate to 0.001 g.

4.2 Sample Determination

Heat up the plate, which is loaded with the test sample, in sand bath, or on an electric

heating plate to 90 °C. The rate of temperature rise shall be controlled at around

10 °C/min. During the heating process, use a thermometer to stir it.

5 Expression of Analytical Result

The content (X) of moisture and volatile matter shall be expressed in mass fraction,

and be calculated in accordance with Formula (1).

6 Precision

The absolute difference of two independent determination results obtained under

repeatability condition shall not exceed 10% of the arithmetic mean value.

7 Principle

Same as Chapter 2.

8 Instruments and Equipment

8.1 Analytical balance. division value. 0.001 g.

8.4 Dryer. contain effective desiccant.

9 Analytical Procedures

9.1 Sample Preparation

In a pre-dried and pre-weighed glass container, in accordance with the predicted

content of moisture and volatile matter in the sample, weigh-take 5 g or 10 g of sample,

accurate to 0.001 g.

9.2 Sample Determination

Place the glass container, which holds the sample, into an electric drying oven at

103 °C ± 2 °C for 1 h. Then, transfer it into a dryer; cool it down to room temperature.

Weigh it, accurate to 0.001 g. Repeat the steps of heating, cooling down and weighing.

10 Expression of Analytical Result

The content (X) of moisture and volatile matter shall be expressed in mass fraction,

and be calculated in accordance with Formula (2).

11 Precision

The absolute difference of two independent determination results obtained under

repeatability condition shall not exceed 10% of the arithmetic mean value.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 7 pages — is available in the English PDF.

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