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LY/T 1650-2005 (LY/T1650-2005, LYT 1650-2005, LYT1650-2005) & related versions
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LY/T 1650-2005: PDF in English (LYT 1650-2005)
LY/T 1650-2005
ICS 65.020
B 66
Forestry Industry Standard
of the People’s Republic of China
Hazelnut nut
榛子坚果 平榛, 平欧杂种榛
Issued by. State Forestry Administration
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 5 
4 Requirements ... 6 
5 Test methods ... 7 
6 Test rules ... 10 
7 Labels and marks ... 11 
8 Packaging ... 11 
9 Transportation and storage ... 11 
Annex A ... 12 
This Standard references to part of contents of the EU 1284/2002 regulation
Annex A of this Standard is normative.
This Standard was proposed by and shall be under the jurisdiction of the State
Forestry Administration.
Drafting organizations of this Standard. Economic Forest Research Institute of
Liaoning Province.
Main drafters of this Standard. Xie Ming, Zheng Jinli, Wang Daoming, Qu Hui, Sun
Ming, Jiang Zhongguan, and Yu Dongmei.
This Standard is released for first-time.
Hazelnut nut
1 Scope 
This Standard specifies the quality requirements, test methods, test rules, packaging,
labels, signs, transportation, and storage of hazelnut nuts.
This Standard applies only to the production and marketing of Corylus heterophylla
Fisch. and Corylus heterophylla Fisch. × Corylus avellana L.
For European hazelnut nuts that are produced and sold in China, it shall use EU (EC)
1284/2002 regulation to assess.
2 Normative references 
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments
(excluding corrections) or revisions do not apply to this Standard, however, parties
who reach an agreement based on this Standard are encouraged to study if the latest
versions of these documents are applicable. For undated references, the latest edition
of the referenced document applies.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 5009.11 Determination of total arsenic and abio-arsenic in food
GB/T 5009.12 Determination of lead in foods
GB/T 5009.17 Determination of total mercury and organic-mercury in foods
GB/T 5009.19 Determination of HCH and DDT residues in foods
GB/T 5009.20 Determination of organophosphorous pesticide residues in foods
GB 5491-1985 Inspection of grain and oilseeds - Methods for sampling and
sample reduction
GB 7718 General standard for the labeling of prepackaged foods
GB 18406.2-2001 Safety qualification for agricultural product - Safety
requirements for non-environmental pollution fruit
m — Mass of a single nut, in units of grams (g);
m1 — Mass of sample nuts, in units of grams (g);
N — Number of sample nuts, in units of grain.
5.3 Kernel rate
In the samples, randomly WEIGH about 1000g of sample nuts. WEIGH the mass of
sample nuts. Then BREAK the nutshells and TAKE the kernels one by one. And
WEIGH the mass of kernels.
Kernel rate is calculated according to equation (2), accurate to the nearest integer.
X — Kernel rate, %;
m2 — Mass of sample kernels, in units of grams (g);
m1 — Mass of sample nuts, in units of grams (g).
5.4 Impurity content
Randomly WEIGH about 1000g of samples, and WEIGH the mass of samples. Then
PUT the samples on a clean table, PICK out the fruit buds, leaves, twigs, weeds, and
other impurities mixed in the nuts and weigh.
Impurity content is calculated according to equation (3), accurate to 0.1g.
I — Impurity content, %;
m3 — Mass of impurities in samples, in units of grams (g);
m4 — Mass of samples, in units of grams (g).
E — Empty nut rate, %;
N4 — Number of empty nuts, in units of grain;
N — Number of sample nuts, in units of grain.
5.8 Moisture
Determination method is shown in Annex A.
5.9 Hygienic inspection
Determination method is implemented according to the specifications of GB/T
5009.12, GB/T 5009.17, GB/T 5009.19, GB/T 5009.11, and GB/T 5009.20.
6 Test rules 
6.1 Batch
The hazelnuts of the same-origin, same-grade, and the same batch of acquisition,
transportation, and marketing are deemed as a test batch.
6.2 Sampling
IMPLEMENT according to the specifications of 2.1,, 2.3.2, and 3.1 of GB
6.3 Determination rules
6.3.1 If the products meet the requirements of Chapter 4 after test, then this batch of
products are determined as qualified products of the corresponding grades according
to this Standard.
6.3.2 If there is one item not meeting the basic requirements of 4.1 and grade
requirements of 4.3, then this batch of products is determined as unqualified
according to this Standard.
6.3.3 In special-grade nuts, the mass of first-grade nuts and second-grade nuts shall
not exceed 12% of the total mass. In first-grade nuts, the mass of second-grade nuts
shall not exceed 12% of the total mass.
6.4 Re-inspection
Annex A 
Determination of moisture content - direct drying method
A.1 Principle
DETERMINE the moisture content by calculating the mass differences of hazelnut
nuts before and after being dried at 103°C (±2°C) in drying oven for 6h.
A.2 Appliances
A.1.1 Mortar.
A.2.2 Balance ( sensitivity is 0.001g).
A.2.3 Glass or metal weighing dishes with lids.
A.2.4 Electric drying oven with ventilation, and the temperature is adjusted to 103°C
A.2.5 Dryers that contain effective desiccant (i.e., calcium chloride).
A.3 Sample preparation
BREAK the nutshells of the sample hazelnuts to be tested and TAKE out the kernels.
GRIND the kernels in a mortar. If necessary, PUT the hazelnut shells that are as
samples in a porcelain mortar to grind or crush to fine particles with the particle size of
A.4 Drying processing, weighing, and calculation
A.4.1 DRY the weighing dish and its lid in the drying oven for at least 2h, then put
them in the dryer. COOL the weighing dish and its lid to room temperature.
A.4.2 WEIGH the mass (m0) of empty weighing dish and its lid.
A.4.3 WEIGH about 50g of the test materials, and SPREAD them evenly on the
bottom surface of the weighing dish that has been dried. Then COVER the weighing
dish with the lid quickly. WEIGH the whole mass (m1). When conducting this part of
the operation, OPERATE as quickly as possible.
A.4.4 PUT open weighing dish along with the lid into a drying oven. CLOSE the door;
CONDUCT drying processing. After 6h, OPEN the door. COVER the weighing dish
with the lid quickly, and PLACE it in the dryer to cool. When cooled to the same
temperature as the surrounding environment, WEIGH the mass (m2) of the closed
A.4.5 The percentage expression of moisture content of the sample is shown in
equation (A.1).
The results shall be accurate to the nearest integer.
A.4.6 TAKE the average value obtained by the results of four parallel sample
measurements as the test result.
A.5 Other inspection methods that are calibrated by direct drying method have the
same test effectiveness. However, the direct drying method is the arbitration method.
Moisture content of the sample (%)

Standard ID LY/T 1650-2005 (LY/T1650-2005)
Description (Translated English) Hazelnut nut
Sector / Industry Forestry Industry Standard (Recommended)
Classification of Chinese Standard B66
Classification of International Standard 65.020
Word Count Estimation 9,977
Date of Issue 2005-08-16
Date of Implementation 2005-12-01
Drafting Organization Economic Forest Institute of Liaoning Province
Administrative Organization State Forestry Bureau
Summary This standard specifies the hazel nuts quality requirements, test methods, inspection rules, packaging, labeling, marking, transportation and storage. This standard applies only to peaceful Europe hybrids hazel Corylus nuts production and marketing. Production and sales in our European hazel nuts using the EU (EC) 1284/2002 regulatory evaluation.