AI SearchEvaluation of arsenic field test kits in Cambodia : (Record no. 40843)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 03816nas|a2200385 i 4500 |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20260818112702.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 040621s2003 th uzm rtt 00| a1eng d |
| 035 ## - SYSTEM CONTROL NUMBER | |
| System control number | .b11929923 |
| 099 #9 - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Classification number | AIT Thesis no.EV-03-30 |
| 100 0# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Phan Sophary |
| 245 10 - TITLE STATEMENT | |
| Title | Evaluation of arsenic field test kits in Cambodia : |
| Remainder of title | through confirmatory testing |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | Pathum Thani, Thailand : |
| Name of publisher, distributor, etc. | Asian Institute of Technology, |
| Date of publication, distribution, etc. | 2003 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 78 leaves |
| 490 1# - SERIES STATEMENT | |
| Series statement | Thesis ; |
| Volume/sequential designation | no. EV-03-30 |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (M.Sc.) - Asian Institute of Technology, 2003 |
| 500 ## - GENERAL NOTE | |
| General note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science. |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | For a country like Cambodia with a significant groundwater arsenic problem, there is an urgent need for the arsenic-contaminated wells to be quickly identified and appropriate action to be taken. This will involve the testing of a large number of wells. A field testing kit made by Hach is currently used national-wide. The field Hach kit is based upon the Gutzeit method, which involves the reduction of arsenic to arsine gas, which reacts with mercuric bromide to form yellow colour. The determination of arsenic concentration is done by visual comparison of the coloured stain with a colour chart. The detection limit of the Hach kit is about 10 og/L. Since Hach kit is widely used it became necessary to evaluate its effectiveness and possible made suggestions for improvement. The Hach kit performance was evaluated in various ways including arsenic standard solution, samples preservation using hydrochloric and nitric acid, quality of the test strip, effect of hydrogen sulphide, colour scale reading and reaction time. Samples from 94 tube wells were tested by kit and by a reliable laboratory technique to ascertain the reliability. Overall the Hach kit performed well with arsenic standard solution as well as with preserved samples. Problems were noted in proper use and storage of test strips as well as interference from hydrogen sulphide. It was also noted that operators usually fail to record arsenic concentration in ranges between the two-gradation values of the colour scale. The 20-minutes reaction time recommended by the kit procedures was not adequate; 30 minutes was necessary to give good results. The comparison of the analytical results of 94 samples showed Hach kit usually gave higher result than either HG AAS or SDDC methods except at arsenic concentration below 10 og/L. The closest agreement between Hach kits and laboratory methods were observed when arsenic concentrations were low. There were 12 (13%) false positives found but no false negatives. All of the finding suggest further development is needed to improve methods of testing arsenic concentrations for less developed countries like Cambodia. |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Arsenic wastes |
| Geographic subdivision | Cambodia |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Visvanathan, C., |
| Relator term | Chairperson |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Nguyen, Thi Kim Oanh, |
| Relator term | Examination Committee |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Preeda Pakpian, |
| Relator term | Examination Committee |
| 710 2# - ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | Swedish International Development Agency (Sida), |
| Relator term | Scholarship Donor |
| 810 2# - SERIES ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | Asian Institute of Technology. |
| Title of a work | Thesis ; |
| Volume/sequential designation | no. EV-03-30 |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Materials specified | Full-Text |
| Uniform Resource Identifier | <a href=" http://203.159.5.9/ait-thesis/detail.php?q=B08275"> http://203.159.5.9/ait-thesis/detail.php?q=B08275</a> |
| 907 ## - LOCAL DATA ELEMENT G, LDG (RLIN) | |
| a | .b11929923 |
| b | mnait |
| c | u |
| 902 ## - LOCAL DATA ELEMENT B, LDB (RLIN) | |
| a | 240417 |
| 998 ## - LOCAL CONTROL INFORMATION (RLIN) | |
| Operator's initials, OID (RLIN) | 0 |
| Cataloger's initials, CIN (RLIN) | 040618 |
| First date, FD (RLIN) | m |
| -- | a |
| -- | u |
| -- | 0 |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnait |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnarc |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | 22-AIT Thesis (Replacement) |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | 40-Archives |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050120706535 |
| CREATED | CREATED : 2014-04-02 |
| RECORD Id | RECORD # : i12755783 |
| LPATRON | LPATRON : 0 |
| LCHKIN | LCHKIN : - |
| RENEWALS | # RENEWALS : 0 |
| -- | # OVERDUE : 0 |
| -- | IUSE3 : 0 |
| -- | TOT CHKOUT : 0 |
| -- | TOT RENEW : 0 |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050160051107 |
| CREATED | CREATED : 2016-05-25 |
| RECORD Id | RECORD # : i12990590 |
| LPATRON | LPATRON : 0 |
| LCHKIN | LCHKIN : - |
| RENEWALS | # RENEWALS : 0 |
| -- | # OVERDUE : 0 |
| -- | IUSE3 : 0 |
| -- | TOT CHKOUT : 0 |
| -- | TOT RENEW : 0 |
| Withdrawn status | Lost status | Damaged status | Not for loan | Home library | Current library | Shelving location | Date acquired | Cost, normal purchase price | Total checkouts | Full call number | Barcode | Date last seen | Copy number | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | AIT Publications | 18/08/2026 | 50.00 | AIT Thesis no.EV-03-30 | 30050120706535 | 18/08/2026 | 3 | 18/08/2026 | 22-AIT Thesis (Replacement) | ||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | Archives | 18/08/2026 | AIT Thesis no.EV-03-30 | 30050160051107 | 18/08/2026 | 18/08/2026 | 40-Archives |