name the apparatus used for arsenic limit test
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The apparatus (Fig.) consists of a 100-ml bottle or conical flask closed with a rubber or ground glass stopper through which passes a glass tube (about 20 cm x 5 mm).
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The apparatus used for the arsenic limit test is a conical flask.
• A test paper is held between two flat ground flanges that are kept together by two spiral springs in this two-part device.
• A 19/26 ground glass joint on the lower tube section is suited for a 100 mL conical flask.
• The gases from the flask diffuse up the tube, capturing the arsine and leaving a yellow stain behind.
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