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1、J IS JAPANESE 1 NDUSTRIAL STANDARD Translated and Published by Japanese Standards Association Measuring method for volatile organic compounds in airborne by gas detector tube ICs 13.040.20; 71.040.40; 71.080.01 Reference number : JIS K 0306 : 2004 (E) PROTECTED BY COPYRIGHT 7s Copyright Japanese Sta
2、ndards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 01:13:07 MDTNo reproduction or networking permitted without license from IHS -,-,- K 0306 : 2004 Foreword This translation has been made based on the original Japa
3、nese Industrial Standard established by the Minister of Economy, Trade and Industry through deliberations at the Japanese Industrial Standards Committee in accordance with the Industrial Standardization Law. Attention is drawn to the possibility that some parts of this Standard may conflict with a p
4、atent right, application for a patent after opening to the public, utility model right or application for registration of utility model after opening to the public which have technical properties. The relevant Minister and the Japanese Industrial Standards Committee are not responsible for identifyi
5、ng the patent right, application for a patent after opening to the public, utility model right or application for registration of utility model after opening to the public which have the said technical properties. Date of Establishment: 2004-05-20 Date of Public Notice in Official Gazette: 2004-05-2
6、0 Investigated by: Japanese Industrial Standards Committee Standards Board . Technical Committee on Environment and Recycling Policy JIS K 0306 : 2004, First English edition published in 2004-08 Translated and published by: Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 J
7、APAN In the event of any doubts arising as to the contents, the original JIS is to be the final authority. O JSA 2004 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without pe
8、rmission in writing from the publisher. Printed in Japan PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 01:13:07 MDTNo reproduction or networking permitted without l
9、icense from IHS -,-,- K 0306 : 2004 Contents Page Introduction . Scope Normative references Definitions Outline of measuring method Classification Instrument and apparatus . Measurement procedure . Annex (normative) Method for performance test of gas detector tube (i PROTECTED BY COPYRIGHT Copyright
10、 Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 01:13:07 MDTNo reproduction or networking permitted without license from IHS -,-,- JAPANESE INDUSTRIAL STANDARD JIS K 0306 : 2004 Measuring method for
11、 volatile organic compounds in airborne by gas detector tube Introduction In order to perform the environmental management dealing with vola- tile organic compounds, it is often required the measurement of their concentration in the neighboring air. This Japanese Industrial Standard specifies so tha
12、t these measurements are able to be easily performed. 1 Scope This Standard specifies the method for measuring the concentration of trichloroethylene (trichloroethene) and tetrachloroethylene (tetrachloroethene) in the airborne volatile organic compounds by a length-of-strain type long term gas dete
13、c- tor tube. Furthermore, this Standard applies in the case where the concentration of the target substance to be measured is that of several 10 pg/m3 to several 100 pg/m3 and the concentration less than or more than that, and the influence of the interfer- ing substance on a gas detector tube is ne
14、gligible. 2 Normative references The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. The most recent editions of the standards (including amendments) indicated below shall be applied. JIS B 7516 Metal rules JIS K 0804 Gas dete
15、ctor tube measurement system (Length-of-stain type) JIS Z 8703 Standard atmospheric conditions for testing JIS Z 9010 Sequential sampling plans for inspection by variables for percent nonconforming (known standard deviation) Sampling procedures for inspection by attributes-Part O : Intro- duction to
16、 the JIS Z 9015 attribute sampling system JIS Z 9015-0 3 Definitions apply. For the purposes of this Standard, the following definitions shall detection reagent carrier particles impregnated with reagents capable of clearly distinguishing a reaction portion from a non-reaction portion by quickly rea
17、ct- ing with the target substance to be measured in sample air length-of-strain type gas detector tube a transparent tube filled with de- tection reagents, which measures the concentration of the target substance to be measured by a length of a coloured layer long term gas detector tube a gas detect
18、or tube used for the purpose of the determination of the mean substance concentration for several 10 min pretreatment tube a tube filled with a pretreatment reagent of sample air, such as a dehumidification reagent or a decomposition reaction reagent, which is used by connecting to the front stage o
19、f gas detector tube PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 01:13:07 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 K 0306 : 2004
20、 No. 1 e) air sampling apparatus an apparatus which gathers the target substance to be measured (trichloroethylene and tetrachloroethylene) by connecting a pre- treatment tube and a gas detector tube, and passing sample air at a fixed air flow rate through a gas detector, etc. Name of gas detector t
21、ube Chemical formula Trichloroethylene ClzC=CHCI 4 Outline of measuring method The measuring method shall be based on a system to suck in sample air continuously with a motor pump through the gas detector tube for target substance to be measured, and the concentration of target substance to be measu
22、red shall be measured from the concentration graduation at the top end of colour change produced due to a reaction of the target substance to be measured and the detection reagent. 5 Classification The classification of the gas detector tube by the target substance to be measured shall be expressed
23、by attaching each name of the target substance to be measured given in table 1 to each gas detector tube respectively. Table 1 Classification of gas detector tube by target substance to be measured I Target substance to be measured 2 I Tetrachloroethylene I C12C=CC12 6 Instrument and apparatus 6.1 A
24、ir sampling apparatus 6.1.1 Outline The example of the air sampling apparatus connected to the pre- treatment tube and gas detector tube shall be as shown in figure 1. The air sam- pling apparatus shall be equipped with the gas detector tube fitting opening, suction pump, regulation section and indi
25、cation section of suction flow rate, and shall have the structure capable of sucking in sample air continuously. PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 01:13
26、:07 MDTNo reproduction or networking permitted without license from IHS -,-,- 3 K 0306 : 2004 detector ! Em Pretreatment tube Regulation s- of suction na tube I Connection fitting I rubber tube opening I Gas detector tube l Suction Pump il Indication section of suction flow rate I I l Figure 1 Examp
27、le of air sampling apparatus connected to pretreatment tube and gas detector tube (The system which integrates the sections given inside the broken line may be used.) 6.1.2 Performance be as follows: a The quality and performance of air sampling apparatus shall Stability The suction pump shall be ca
28、pable of sucking in at a suction flow rate which meets the service condition of gas detector tube with the pretreat- ment tube and gas detector tube connected, and sucking in at a stabilized flow rate within I 5 % without pulsation. Reproducibility A set flow rate shall be reproducible within + 5 %.
29、 b) 6.1.3 Test a) Stability test As shown in the example of figure 1, connect air sampling ap- paratus with the pretreatment tube and gas detector tube and further connect the soap film flowmeter to the front stage of pretreatment tube, operate the apparatus continuously, and record the indicated va
30、lue of soap film flowmeter 3 times or over every 10 min. Reproducibility test once and turn on again, and repeat this procedure 3 times. b) With regard to the test in 6.1.3 a), turn off the power 6.2 Gas detector tube and pretreatment tube 6.2.1 Structure The structure of gas detector tube and pretr
31、eatment tube shall be such that a fixed amount of pretreatment reagent or detection reagent is filled into the transparent tube such as the glass tube with a uniform inside diameter and a uniform overall length, and the plug is applied so that this does not loosen, and further the both ends of tube
32、are sealed. The concentration graduation of gas detec- tor tube shall be marked in an indelible manner. 6.2.2 Quality and performance tube shall be as given in table 2. The test method shall be as given in annex. The quality and performance of a gas detector PROTECTED BY COPYRIGHT Copyright Japanese
33、 Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 01:13:07 MDTNo reproduction or networking permitted without license from IHS -,-,- 4 K 0306 : 2004 Table 2 Quality and performance of gas detector tube(1) Item
34、 Appearance Measurement lower limit Measurement upper limit Precision on indication Slant of top end face of colour change Influences of temperature Influences of humidity Slant of end face of detection reagent on gas inlet side Quality and performance The appearance shall be free from pinhole, crac
35、k, flaw, etc. and the graduation shall be clear. Trichloroethylene Tetrachloroethylene shall be 30 pg/m3 m a . shall be 30 pg/m3 max. Trichloroethylene Tetrachloroethylene shall be 300 pg/m3 min. shall be 300 pg/m3 min. Errors to the concentration of testing gas of at least 113 the graduation range
36、Indicated value of gas detector tube Mean value of indicated values within 25 7 within 15 % Errors to the concentration of testing gas of at most 113 the graduation range Indicated value of gas detector tube Mean value of indicated values within 35 7i within 25 7% The value of ALIM shown in figure 2
37、 within 20 % The precision on indication shall be satisfied at a temperature of 10 “C f 2 “C and 30 “C i 2 O C . The precision on indication shall be satisfied at a relative humidity of (20 I 10) 3 % and (80 f 10) 5%. The value of Al shown in figure 3 within 2 mm Note (1) The gas detector tube here
38、described includes the pretreatment tube and its perfor- mance. Gas detector tube Flow of 1 sample air AL - 0.20 M - where, M : mean value of indicated concentration value Li : minimum indicated concentration La : maximum indicated concentration Figure 2 Slant of top end face of colour change PROTEC
39、TED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 01:13:07 MDTNo reproduction or networking permitted without license from IHS -,-,- 5 K 0306 : 2004 Direction of flow - dl 7
40、Measurement procedure a) Selection of measurement point For the location where the leakage of tar- get substance to be measured is anticipated, select the spot at a height of 1.5 m as a measurement point. Furthermore, as necessary, take sample air into a sampling bag(2), etc. once, and introduce it
41、into the gas detector tube after per- forming the homogenization of sample air. Note (2) It shall be made of materials such as polyvinyl fluoride, polyester for which adsorption and permeation, and deterioration of sample air are as small as possible, and shall have the volume of 2 times or over the
42、 amount of sample air taken. Furthermore, also for the pump for sam- pling, select materials for which adsorption and permeation, and de- terioration of sample air are as small as possible. b) Measurement preparation i) Measure the temperature and humidity at the measurement point, and confirm that
43、they are in the service range shown in the specification of gas detector tube. 2) Make the temperature of the gas detector tube to be used become the tem- perature in the measurement location(3). Furthermore, take care so that it is not exposed to direct sunlight at this time. Note (3) When using th
44、e gas detector tube which has been stored in a dark and cool place such as in a refrigerator, use it after its tempera- ture becomes equivalent to outside air temperature. Perform the leakage test of air sampling apparatus according to the speci- fication. Beforehand, connect the same type used pret
45、reatment tube and gas detec- tor tube to the gas detector tube fitting opening of air sampling apparatus and pass air, and set a suction velocity to that described in the specification of gas detector tube. 3) 4) c) Measurement i) Cut both ends of pretreatment tube and gas detector tube, and connect
46、 them to the fitting opening of gas detector tube so that sample air flows in the direction of the arrow printed on the surface of gas detector tube as shown in the example of figure 1. As soon as the air sampling apparatus is operated, confirm the flowmeter, and when it differs from the suction flo
47、w rate described in the specifica- tion (for example, 300 ml/min), adjust it. 2) PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 01:13:07 MDTNo reproduction or networ
48、king permitted without license from IHS -,-,- 6 K 0306 : 2004 3) Take sample air during the time described in the specification of gas de- tector tube. If the flow rate seems to change during this time, keep it con- stant by regulating so that the predetermined flow rate is obtained. Remove the gas detector tube immediately after the completion of suction, and read out the concentration graduation of the top end of colour change layer (4) (5). 4) Notes (4) (5) 5) When the Since there is a case where the changed colour fades with the tim