Hanna Instruments HI 904 - Method Options; Pre-analysis Stir Time; Stirring Speed; Background Drift Rate Entry


0(7+2'6237,0,=$7,21
 $EVROXWH'ULIW6WRS
8QGHUWKLVFULWHULDDWLWUDWLRQUHDFKHVDQHQGSRLQWVXFFHVVIXOO\ZKHQWKHGULIWIDOOVEHORZD
SUHGHILQHGWKUHVKROGFDOOHGWKHDEVROXWHGULIWVWRSYDOXH
:KHQVHWWLQJWKHDEVROXWHGULIWWKUHVKROGDEDODQFHPXVWEHVWUXFNEHWZHHQWKHWLWUDWLRQ
VSHHGDQGDFFXUDF\&KRRVLQJDWKUHVKROGVOLJKWO\KLJKHUWKDQWKHLQLWLDOGULIWUDWHZLOOUHVXOW
LQKLJKUHSURGXFLELOLW\DQGUHODWLYHO\VORZWLWUDWLRQV6HWWLQJWKHWKUHVKROGKLJKHU!PJPLQ
ZLOOUHVXOWLQYHU\IDVWWLWUDWLRQVDQGUHGXFHGWLWUDWLRQUHSURGXFLELOLW\
7KH FXUUHQW GULIW UDWH PXVW EH FRQVLGHUHG EHIRUH VHOHFWLQJ DQ DEVROXWH GULIW VWRS YDOXH
6HWWLQJWRORZRIDYDOXHUHODWLYHWRWKHVWDUWLQJGULIWUDWHPD\FDXVHWKHWLWUDWLRQWRFRQWLQXH
LQGHILQLWHO\ZLWKRXWUHDFKLQJDYDOLGHQGSRLQW
 0HWKRG 2SWLRQV
 3UHDQDO\VLV6WLU7LPH
:KHQDQDO\]LQJVDPSOHVZLWKOLPLWHGPLVFLELOLW\RUUHOHDVHZDWHUVORZO\WKHVDPSOHPXVWEH
VWLUUHGSULRUWRWKHVWDUWRIDWLWUDWLRQWRDYRLGHUURQHRXVO\ORZWLWUDWLRQUHVXOWVRUXQUHDFKDEOH
HQGSRLQWV 7KH SUHDQDO\VLV VWLU WLPH RSWLRQ HQVXUHV WKDW DIWHU WKH VDPSOH LV DGGHG WKH
WLWUDWLRQPL[WXUHLVVWLUUHGIRUDSHULRGRIWLPHEHIRUHDQ\LRGLQHLVJHQHUDWHGLQWKHFHOO7KH
SUHDQDO\VLVVWLUWLPHFDQEHVHWEHWZHHQDQGVHFRQGV
 6WLUULQJ6SHHG
7KH+,¶VVWLUULQJVSHHGFDQEHVHWEHWZHHQDQG530ZLWK530UHVROXWLRQ
7KH VWLUULQJ V\VWHP LV HTXLSSHG ZLWK DQ RSWLFDO IHHGEDFN PHFKDQLVP WR HQVXUH WKDW WKH
VWLUULQJPRWRULVURWDWLQJDWWKHVSHHGVHWE\WKHXVHU
7KHRSWLPXPVWLUULQJVSHHGLVREWDLQHGZKHQDVPDOOYRUWH[LVYLVLEOH,IWKHVWLUULQJVSHHGLV
WRRORZWKHWLWUDQWZLOOQRWUHDFWZLWKWKHVDPSOHEHIRUHUHDFKLQJWKHHOHFWURGHUHVXOWLQJLQ
RYHUWLWUDWLRQDQGSRRUWLWUDWLRQUHSURGXFLELOLW\,IWKHVWLUULQJVSHHGLVWRRKLJKEXEEOHVZLOO
IRUPLQWKHVROXWLRQ%XEEOHVFDQGHVWDELOL]HRUIDOVLI\WKHPHDVXUHGHOHFWURGHSRWHQWLDO
7KHGHIDXOWVWLUULQJ VSHHGIRUFRPPHUFLDOO\ DYDLODEOHVWDQGDUG.DUO )LVFKHUUHDJHQWVXVHG
ZLWKLQWKHRSHUDEOHYROXPHUDQJHRIWKHVWDQGDUG+DQQD,QVWUXPHQWV FHOO DQG ZLWK WKH
VXSSOLHG PDJQHWLF VWLUULQJ EDU LV  530 $V WKH OLTXLG OHYHO ZLWKLQ WKH WLWUDWLRQ YHVVHO
LQFUHDVHVLWPD\EHQHFHVVHU\WRLQFUHDVHWKHVWLUULQJVSHHGWRVXIILFLHQWO\PL[WKHVROXWLRQ
 %DFNJURXQG'ULIW5DWH(QWU\
7KLVRSWLRQSURYLGHVDFKRLFHEHWZHHQWKH+,¶VDXWRPDWLFGULIWUDWHGHWHUPLQDWLRQDQG
DVVLJQLQJDIL[HGYDOXHWREHXVHGE\WKHWLWUDWRUDVWKHGULIWUDWH
7KH SULPDU\ EHQHILW RI E\SDVVLQJ WKH DXWRPDWLF GULIW UDWH IHDWXUH LV VDYLQJ WLPH 7KLV LV
DSSURSULDWHZKHQWLWUDWLQJVDPSOHVZLWKKLJKZDWHUFRQWHQWZKHUHWKHGULIWUDWHLVWRRORZWR
DIIHFWWLWUDWLRQUHVXOWVRULQGLDJQRVWLFVLWXDWLRQVZKHUHWKHUHLVQRDGYDQWDJHLQZDLWLQJIRU
WKH+,WRFRQGXFWDGULIWUDWHDQDO\VLV