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GB/T 11446.9-2013 English PDF (GBT11446.9-2013)

GB/T 11446.9-2013 English PDF (GBT11446.9-2013)

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GB/T 11446.9-2013: Test method for particles in electronic grade water by instrument

This Part of GB/T 11446 specifies the instrumental method for the determination of particles, in electronic grade water. This Part applies to the continuous or single detection and counting of particles, in electronic grade water. The measured particle size is not less than 0.05 ??m; the concentration range of the particles is 0 ~ 10000 pcs/mL.
GB/T 11446.9-2013
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 31-030
L 90
Replacing GB/T 11446.9-1997
Test method for particles in electronic grade water by
instrument
ISSUED ON: DECEMBER 31, 2013
IMPLEMENTED ON: AUGUST 15, 2014
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Principles of the method ... 5
5 Disturbing factors ... 6
6 Reagents ... 6
7 Measuring instruments ... 7
8 Operation procedures ... 7
9 Calculation of measurement results ... 7
10 Error analysis ... 8
11 Report ... 8
Test method for particles in electronic grade water by
instrument
1 Scope
This Part of GB/T 11446 specifies the instrumental method for the determination of particles, in electronic grade water.
This Part applies to the continuous or single detection and counting of particles, in electronic grade water. The measured particle size is not less than 0.05 ??m; the concentration range of the particles is 0 ~ 10000 pcs/mL.
2 Normative references
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard.
GB/T 11446.1-2013 Electronic grade water
GB/T 11446.3-2013 Generic rules for test methods of electronic grade water 3 Terms and definitions
The terms and definitions as defined in GB/T 11446.3-2013, as well as the following terms and definitions, apply to this document.
3.1
Particle
Granular, gas removed, non-liquid substance, which is non-uniformly
dispersed in water.
4 Principles of the method
A focused laser beam is incident perpendicular to the direction of the water sample flow. The particles in the water will produce a light scattering effect. The intensity of the scattered light has a certain relationship, with the size of the particles. The scattered light focuses on the photomultiplier, through the 11446.1-2013.
7 Measuring instruments
A laser-scattering type submicron liquid particle counting and detecting instrument, which has a microcomputer.
8 Operation procedures
8.1 Preparation before instrument test
Turn on the power, according to the instrument's instructions, to make the instrument enter the ready-to-work state.
8.2 Test method
8.2.1 Continuous sampling
First use the degreasing detergent, to clean the pipe. Then lead in EW-I electronic grade water, to rinse it for 30 minutes. Perform the test, according to the operating rules of the continuous test of the instrument.
8.2.2 Single sampling
First use the degreasing detergent, to clean the sampling bottle. Then use the EW-I electronic grade water to clean it. Take a 4/5 volume of water sample, from the sampling bottle. Add a cover. Place it in a clean room, for later use. Before sampling, the sampling bottle is rinsed several times, by the water, which was filtered through a 0.02 ??m microporous membrane. Prevent external
contamination, when sampling. Then carry out the measurement, according to the operating procedure of the single test of the instrument.
9 Calculation of measurement results
Calculate the particle number concentration, according to formula (1):
Where:
P - The number of particles per liter of water sample, in pcs per liter (pieces/L);
Pi - The number of particles in each liter of water sample, at the ith

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