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. r>: -=Cn: [It 'eGZENAN TCr 4CGFli C.a F?X ~ =~'G 13. L°9e S:._., :~. ?.E '. • 4.6.2 If a xaste contains a stgnificant amount of nonaqueous ' liquid in the initial ltquid phasz (i_e., >1 % of total waste), the syringe or the TEDIAR~ bag may be used for both the initial solid/licuid separation and the final extract filtration. However, analysts should usz one or the other, not bath. 4.6.3 If the waste contains no initial liquid phase (is 100 » solid) or has no significant solid phase (is 100 ~ liquid), either the TEDLAR~ bag or the syringe may be used. if the syringe is used, discard the first 5 ml of liquid expressed from the device. The remaining aliquots are used for analysis. 4.7 ZHE Extraction fluid Transfer Devices: Any device capable of transferring the extraction fluid into the ZHE without changing the nature of the extraction fluid is acceptable (e.a., a positive displacement or peristaltic pump, a gas-tight syringe, pressure filtration unit (see Step 4.3.2}, or other ZHE device}. 4.8 Laboratory Balance: Any laboratory balance accurate to within + 0.01 grams may be used (all weight measurements are to be within ± 0.1 grams) 4.9 Beaker or Erlenmeyer flask, glass, 500 ml. 4.10 Watchglass, appropriate diameter to cover beaker or Erlenmeyer flask. 4.11 Magnetic stirrer. 5.0 REAGENTS 5.1 Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it fs intended that all reagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, where such specifications are available. Other grades may be used, provided it is first ascertained that the reagent is of sufficiently high purity to permit its use without lessening the accuracy of the determination. 5.2 Reagent 4later. Reagent water is defined as water in which do interferant is not observed at or above the method's detection limit of the analyte(s) of interest. For nonvolatile extractions, ASTM Type II water or equivalent meets the definition of reagent water. For volatile extractions, it is recommended that reagent water be generated by any of the following methods. Reagent water should be monitored periodically for impurities. 5.2.1 Reagent water for volatile extractions may be generated by passing tap water through a carbon filter bed containing about 500 grams of activated carbon (Colgan Corp., Filtrasorb•300 or equivalent). S.Z.Z A water purification system (Millipore Super-Q or equivalent) may also be used to generate reagent water far volatile extractions. ,` 1312 - 4 Revision 0 November 1492 ~