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7 3 3 Arsemc solution stock, 1 mL = 7 3 12 Iron solution stock 1 mL 7 3 2 3 ThallIUm solution stock 1 mL = 100 f.1g TI Dissolve a 1303 9 TlN03 Irl deionized, distilled water Add 10 a mL conc HN03 and dIlute to 1,000 mL With deiOnized, distilled water 7 3 24 Vanadium solution stock, 1 mL=100f.1gV Dissolve02297 NHN03 In a minimum amount of conc HN03 Heat to Increase rare of diSSolution Add 100 mL conc HN03 and dilute to 1,000 mL WIth deionized dIstilled water 100 pg As Dissolve 0 1320 9 of AS203 In 100 mL of deionized, distilled water containing a 4 9 NaOH ACidify the solution with 2 mL conc HN03and dilute to 1,000 mL with deionized distilled Water 734 Banumsolution stock 1mL = 100 p.g Ba Dissolve a1516 9 BaCb (dried at 2500 C for 2 hrs) In 10 mL deIOnized, distIlled water Wit'" 1 mL (1+1) HCI Add 100 mL (1+1) HCI and dilute to 1,000 mL wIth deionized, distilled water 7 3 5 BeryllIUm solution stock 1 mL =100 f.1g Be Do not dry DIs- solve 1 966 9 BeS04 4 4H20 In deionized, distilled water add 100 mL conc HN03 and dilute to 1 000 mL with deIOnized, distilled water 7 3 6 Boron solution stock, 1 mL = 100 f.1g B Do not dry Dissolve 05716 9 anhydrous H~B03 In deionized distilled water dilute to 1,000 mL Use a reagent meeting ACS speCif,ca- tIOns, keep the bottle tightly stoppered and store In a desiccator to prevent the entrance of atmospheric mOisture 7 3 7 CadmIUm solution stock 1 mL =100 p.g Cd Dissolve a1142 9 CdO In a minimum amount of (1+1) HN03 Heat to Increase rate of dis- solution Add 10 a mL conc HN03 and dilute to 1,000 mL with deIOnized, distilled water 7 3 8 CalCIUm solution stock 1 mL = 100 p.g Ca Suspend a2498 9 CaC03 dried at 180°C for 1 h before weighing In deionized distilled water and dissolve cautiously with a min- Imum amount of (1+1) HN03 Add 10 a mL conc HN0 3 and dilute to 1,000 mL with deIOnized distilled = 100 f.1g Fe Dissolve a 1430 9 Fe203 In a warm mixture of 20 mL (1 +1) HCI and 2 mL of conc HN03 Cool, add an addItional 5 mL of conc HN03and dilute to 1000 mL with deionized, distilled water 7313 Leadsolution stock 1mL =100 f.1g Pb Dissolve a1599 9 Pb(N03)2 In minimum amount of (1+1) HN03 Add 100 mL conc HN03 and dilute to 1,000 mL with deionized, distilled water water 7 3 9 ChromIUm solution stock mL =100 pg Cr Dissolve a 1923 9 of Cr03 In deionized, distilled water When solution IS complete, aCidify with 10 mL conc HN03 and dilute to 1,000 mL with deIOnIzed dIstilled water 7 3 10 Cobalt solution stock 1 mL=100f.1gCo Dissolve010009 of cobalt metal In a minimum amount of (1+1) HN03 Add 10 a mL (1+1) HCI and dilute to 1,000 mL with deionized dIstilled water 7 3 11 Copper solution stock 1 mL =100pg Cu Dissolve a1252 9 CuO In a minimum amount of (1 +1) HN03 Add 100 mL conc HN03 and dilute to 1 000 mL with deionized distilled water 7 4 3 Molybdenum silica arseniC, and selenium 7 4 4 Mixed standard solution IV - CalCium sodium potassium alumi- num chromium and nickel 7 3 14 MagneSIUm soluti°on stock dilute to 1,000 mL with deionized, distilled water 7 3 15 Manganese solution stock mL = 100 f.1g Mn Dissolve a 1000 9 of manganese metal In the aCid mix- ture 10 mL conc HCI and 1 mL conc HN03, and dilute to 1,000 mL with deIOnIzed distilled water 7 3 16 Molybdenum solution stock 1 mL = 100 f.1g Mo Dissolve 02043 9 (NH4!2Mo04 In deionized distilled water and dilute to 1 000 mL 7 3 17 Nickel solution stock 1 mL = 100 f.1g NI Dissolve a 1000 9 of nickel metal In 10 mL hot conc HN03,coolanddiluteto1,000mL with deIOnized, distilled water 7 3 18 PotassIUm solution stock mL = 100 f.1g K Dissolve a 1907 9 KCI, dried at 11 OOC In deionized distIlled water dilute to 1 000 mL 7 3 19 Selenium solutIOn stock 1 mL = 100 J.l9 Se Do not dry Dissolve a 1727 9 H2Se03 (actual assay 946%) In deIOnized distilled water and dilute to 1,000 mL 73 20 Silica solution stock 1 mL = 100 f.1g SI02 Do not dry Dissolve 04730 9 Na2S,03 9H20 In deionized distilled water Add 10 a mL conc HN03 and dilute to 1,000 mL with deionized distilled water 7 3 21 Silver solution st°ock 1 mL =100 pg Ag Dissolve 1575 9 AgN03 In 100 mL of deiOnized diS- tilled water and 10 mL conc HN03 Dilute to 1 000 mL with deIOnized distilled water 7 3 2 2 SodIUm solutIOn stock 1 mL =100pg Na Dissolve a2542 9 NaCI In deiOnized distilled water Add 100 mL conc HN03 and dilute to 1 000 mL With deionized distilled water 7 3 2 5 Zmc solution°stock 1 mL Add 100 mL conc HN03 and dilute to 1,000 mL With deiOnized, distilled water 7 4 Mixed calibration standard so- lutions-Prepare mixed calibration standard solutions by combining ap- propriate volumes of the stock solu- tions In volumetriC flasks (See 74 1 thru 7 4 5 ) Add 2 mL of (1+1) HCI and dilute to 100 mL With deionized, distilled water (See Notes 1 and 6) Prior to preparing the mixed standards each stock solution should be analyzed separately to determine pOSSible spectral Interference or the presence of ImpUrities Care should be taken when preparing the mixed standards that the elements are com- patible and stable Transfer the mixed standard solutions to a FEP fluoro- carbon or unused polyethylene bottle for storage Fresh mIxed standards should be prepared as needed With the realizatIOn that concentration can change on aging Calibration stand- ards must be initially verified uSing a quality control sample and moni- tored weekly for stabIlity (See 7 6 3) Although not speCifically reqUired, some tYPical calibration standard com- binations follow when uSing those speCifiC wavelengths listed In Table 1 7 4 1 Mixed standard solution 1 - Manganese beryllium cadmium lead and ZinC 7 4 2 Mixed standard solution 11- Barium, copper, Iron vanadium and cobalt mL = 100 f.1g Mg Dissolve 1245 9 ZnO In a minimum amount of dilute HN03 1658 9 MgO In a minimum amount of (1+1) HN03 Add 100 mL conc HN03 and Dec 1982 Metals-23 = 100 f.1g Zn Dissolve Mixed standard solution 11I-PDF Image | Methods for Chemical Analysis of Water and Wastes
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