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GB/T 21785-2008 PDF English

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GB/T 21785-2008: Laboratory glassware -- Pycnometers
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GB/T 21785-2008English314 Add to Cart 3 days [Need to translate] Laboratory glassware -- Pycnometers

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Basic data

Standard ID GB/T 21785-2008 (GB/T21785-2008)
Description (Translated English) Laboratory glassware -- Pycnometers
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard A80
Classification of International Standard 130.100
Word Count Estimation 16,181
Date of Issue 2008-05-12
Date of Implementation 2008-09-01
Quoted Standard ISO 383; ISO 384-1978; ISO 386; ISO 719; ISO 3585
Adopted Standard ISO 3507-1999, IDT
Regulation (derived from) Announcement of Newly Approved National Standards No. 7, 2008 (No. 120 overall)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard provides a series of density meter in the laboratory for routine measurement of liquid density should have the condition. Special products for special density meter or other use not in normal circumstances densitometer not included in this standard. These density meter is used to define adequate information should be included in the detailed description or describe their use of relevant international standards. Appendix A is a suitable adjustment contents Reye neck level density meter level of the device.

GB/T 21785-2008: Laboratory glassware -- Pycnometers


---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Laboratory glassware.Pyknometers ICS 130.100 A80 National Standards of People's Republic of China GB/T 21785-2008/ISO 3507.1999 Laboratory glassware densitometer (ISO 3507.1999, IDT) Posted 2008-05-12 2008-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard is identical with ISO 3507.1999 "Laboratory glassware densitometer" (in English). Appendix A of this standard is an informative annex. This standard is managed by the National Standardization Technical Committee chemicals dangerous (SAC/TC251) and focal points. This standard was drafted. People's Republic of China, Shenzhen CIQ. Involved in the drafting of the standard units. People's Republic of China Jiangsu Entry-Exit Inspection and Quarantine Bureau, China National Light Industry Product Quality Supervision and Inspection glass center. The main drafters of this standard. Wu Jingwu, Liuxian Jie, Yuan Chunmei, Li Bin, Liu Li, Xu Beibei, Yu Shuyuan, Li Ying, Wang Hongju, Chen Meirong, Wang Hongsong, Liu Junfeng. This standard is the first release. GB/T 21785-2008/ISO 3507.1999 Laboratory glassware densitometer

1 Scope

This standard specifies when a series of laboratory density meter for routine measurement of liquid density should have the condition. Specific density meter or other general condition is not used for special products used under densitometer is not included in this standard. This is used to define These densitometer sufficient information should be included in the detailed description or describe their use of relevant international standards. Appendix A content of a suitable adjustment Reye (Reischauer) densitometer neck level level devices.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms of dated references, all subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to study under this agreement is standard Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. ISO 383 Laboratory glassware --- interchangeable conical ground joints ISO 384. 1978 Design and construction principles of laboratory glassware --- measured volume of glassware ISO 386 laboratory glass liquid thermometer --- design, construction and use of the principle ISO 719 glass, glass grains at 98 ℃ hydrolysis resistance --- Test method and classification ISO 3585 3.3 Characteristics of borosilicate glass ---

3 calibration basis

3.1 volume units The standard unit of volume used in milliliters (mL), and the cubic centimeter (cm3) is equivalent to use. NOTE. milliliter (mL) The term is often used as cubic centimeters (cm3) using a special name. According to the resolution of the Twelfth General Conference on Weights and Measures, in general, in the country When international standards glassware volume involved, the use of reference ml of the term, this standard is also used in ml. 3.2 reference temperature If labeled with the effective volume of the densitometer it should also be marked with a check to determine the effective volume of the temperature. Under normal circumstances, the standard basis Reference temperature should be 20 ℃. When using a density meter in the tropics, the ambient temperature is higher than 20 ℃, these areas do not want to use the standard reference temperature of 20 ℃, which When recommended 27 ℃.

4 types and sizes Series

Below the two tube density meters and four kinds of bottle type density meter is described in detail, such as illustrations listed in Table 1 and Figures 1 to 6. Article 1 and 2 is tubular, is floating densitometer. 3,4,5, and 6 for the bottle-shaped, freestanding flat densitometer. Article 1,3,4 and 2 densitometer (if covered), used in a volatile liquid. Class 5 densitometer used in strong goo. Various types of density meter size range as shown in Table 1. Table 1 densitometer type and size Category name Nominal volume/mL 1 Li Boshi (Lipkin) 12510 2 Steinmann (Sprengel) 51025 3 Galeazzi (Gay-Lussac) 125102550100 GB/T 21785-2008/ISO 3507.1999 ...

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