SMEWW 23rd edition 2017 Part 01 phương pháp chuẩn kiểm tra nước và nước thải.
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SMEWW 23rd edition 2017 Part 01 phương pháp chuẩn kiểm tra nước và nước thải.
Preparation of Common Types of Desk Reagents Specified in Standard MethodsAcid SolutionsPrepare the following reagents by cautiously adding required a SMEWW 23rd edition 2017 Part 01 phương pháp chuẩn kiểm tra nước và nước thải. amount of concentrated acids, with mixing, to designated volume of proper type of distilled water. Dilute to 1000 ml. and mix thoroughly.See Table A fur preparation uf 11C1. ỈLSO4. and 1INỌ, solutions.Alkaline Solutionsa. Stock sodium hydroxide, NaOH. 151V (for preparing. 61V. IV. and 0.1 N solution SMEWW 23rd edition 2017 Part 01 phương pháp chuẩn kiểm tra nước và nước thải. s): Cautiously dissolve 625 g. solid NaOH in 800 ml. distilled water to form I I. of solution. Remove sodium carbonate precipitate by keeping solutionSMEWW 23rd edition 2017 Part 01 phương pháp chuẩn kiểm tra nước và nước thải.
al Ute boiling point tor a lew hours in a hot water bath or by letting particles settle lor al least 48 h in an alkali-resistant container (wax-linedPreparation of Common Types of Desk Reagents Specified in Standard MethodsAcid SolutionsPrepare the following reagents by cautiously adding required a SMEWW 23rd edition 2017 Part 01 phương pháp chuẩn kiểm tra nước và nước thải. y prepare dilute solutions by dissolving the weight of solid NaOII indicated in Table 13 in COj-lree distilled walerand diluting to 1000 mL.Store NaOII solutions in polyethylene (rigid, heavy-type) bottles with polyethylene screw caps, paraffin coated bottles with rubber or neoprene stoppers, or bor SMEWW 23rd edition 2017 Part 01 phương pháp chuẩn kiểm tra nước và nước thải. osilicate glass bottles with rubber or neoprene stoppers. Check solutions periodically. Protect them by attaching a lube of CO;-absorbing granular matSMEWW 23rd edition 2017 Part 01 phương pháp chuẩn kiểm tra nước và nước thải.
erial such as soda lime or a commercially available co,-removing agent.’ Use al least 70 cm of rubber tubing to minimize vapor dillusion from hottie. Preparation of Common Types of Desk Reagents Specified in Standard MethodsAcid SolutionsPrepare the following reagents by cautiously adding required a SMEWW 23rd edition 2017 Part 01 phương pháp chuẩn kiểm tra nước và nước thải. equivalent.TamI.I B. PrurtAHAlUJN IM- tlsuOKM Soixi M HvilkirXIIU-. SriUmONSNormality of NaOH SolutionRequired Weight of NaOH to Prepare IIKXI ml. of SolutionRequired Volume of 15V NaOH to Prepare 1IKXI ml. of Solution mL6240400140670.146.7b. Ammonium hydroxide solutions. NII4OH: Prepare 51V. 3 V. a SMEWW 23rd edition 2017 Part 01 phương pháp chuẩn kiểm tra nước và nước thải. nd 0.2V NH.tOH solutions hy diluting. 333 ml.. 200 ml., and 13 111L. respectively, of the concentrated reagent (sp gr 0.90. 29.0%. 15V) to 1000 111L wSMEWW 23rd edition 2017 Part 01 phương pháp chuẩn kiểm tra nước và nước thải.
ith distilled waler.Indicator Solutionsa. Phenopftthalein indicator solution: Use either the aqueous (1) or alcoholic (2) solution.1)Dissolve 5 g phenPreparation of Common Types of Desk Reagents Specified in Standard MethodsAcid SolutionsPrepare the following reagents by cautiously adding required a SMEWW 23rd edition 2017 Part 01 phương pháp chuẩn kiểm tra nước và nước thải. . distilled water11 necessary, add 0.021V NaOl 1 dropwise until a faint pink color appears in solution I) or 2).I). Methyl orange indicator solution: Dissolve 500 mg methyl orange powder in distilled water and dilute to 1 L.Table A: Preparation <» Uniform Acid Sctx-noNS*Desired ComponentHydrochloric SMEWW 23rd edition 2017 Part 01 phương pháp chuẩn kiểm tra nước và nước thải. Acid (HCI)Sulfuric Acid (H.SOj)Nitric Acid (HNO.ISpecific gravity (MV'I'V) of ACS-gradc cone acid1.174-1.1891.831-1.8361.109-1.418Percent of active iSMEWW 23rd edition 2017 Part 01 phương pháp chuẩn kiểm tra nước và nước thải.
ngredient in cone reagent36-3796-9869-70Normality of cone reagent452423615-16Volume (mL) of cone reagent to prepare 1 L of:18V solution—500 II + l)t—6Preparation of Common Types of Desk Reagents Specified in Standard MethodsAcid SolutionsPrepare the following reagents by cautiously adding required a SMEWW 23rd edition 2017 Part 01 phương pháp chuẩn kiểm tra nước và nước thải. 1717Volume (mL> of IV reagent to prepare 1 L of0.02V solution202020•All valuer• The a ★ b system nf specifying preparatory vutumes appears frequently Ihnxighoul SlanJard Mcttwds and means thal a volumes of the cvuKvnlraled reagent are diluted wilh b vvhrmcs of dirtilk-d waler to form lire required s SMEWW 23rd edition 2017 Part 01 phương pháp chuẩn kiểm tra nước và nước thải. ultrtion.Mips /Moi.org/I0.2l 05/SMWW.2K82.2I6Preparation of Common Types of Desk Reagents Specified in Standard MethodsAcid SolutionsPrepare the following reagents by cautiously adding required aPreparation of Common Types of Desk Reagents Specified in Standard MethodsAcid SolutionsPrepare the following reagents by cautiously adding required aGọi ngay
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