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Standard Test Methods for Zinc in Water
Automaticky preložený názov:
Štandardné skúšobné metódy pre zinku vo vode
NORMA vydaná dňa 1.9.2012
Označenie normy: ASTM D1691-12
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.9.2012
Kód tovaru: NS-18087
Počet strán: 7
Približná hmotnosť: 21 g (0.05 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
atomic absorption, chelation, flame, water, zinc, ICS Number Code 13.060.50 (Examination of water for chemical substances)
Significance and Use | ||||||||||||||||||||||||||||||||
4.1 Zinc is an essential and beneficial element in body growth. Concentrations above 5 mg/L can cause a bitter astringent taste and opalescence in alkaline waters. The zinc concentration of U.S. drinking waters varies between 0.06 and 7.0 mg/L with a mean of 1.33 mg/L. Zinc most commonly enters the domestic water supply from deterioration of galvanized iron and dezincification of brass. Zinc in water also may result from industrial water pollution.3 |
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1. Scope | ||||||||||||||||||||||||||||||||
1.1 These test methods cover the determination of zinc in water. Two test methods are given as follows:
1.2 Either dissolved or total recoverable zinc may be determined. 1.3 These test methods have been used successfully with reagent grade water. See the specific test method for applicability to other matrices. It is the user's responsibility to assure the validity of these test methods in other matrices. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are mathematical conversions and may not be exact equivalents; therefore, each system shall be used independently of the other. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 1.6 Two former colorimetric test methods were discontinued. Refer to Appendix X1 for historical information. |
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2. Referenced Documents | ||||||||||||||||||||||||||||||||
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