Question
a) A 50-year old man employed at company X was given an on-site urine test (using a commercial test strip). He tested positive for amphetamines. Upon questioning, he said that he never took amphetamines, but that he was treating bad head cold symptoms by taking an antihistamine (Actifed Cold and Allergy Tablets) and using a Vick's inhaler. Can these over-the- counter drugs give a false positive result? How would you determine the identity of the compound(s) giving the positive result? Be specific.

b) If company X used the initial on-site test results to fire the man mentioned in question 1, would he have grounds to sue for wrongful termination.

c) The police collected a white powder from a suspected drug dealer and sent it to your laboratory for testing. You, a forensic toxicologist at the laboratory, were called to testify that this substance was identified as cocaine. Briefly (in several paragraphs) address each of the following questions:
- What sort of evidence would you present if the defense attorney suggested that the sample you analyzed was not the sample seized by the police
- Suppose the sample was analyzed by GCMS. What sort of information would you give the jury about the analytical method? How would you demonstrate that you did not have a false positive result
- What, if anything, would you change in the analytical method if you were examining the defendant's urine rather than the powder for cocaine.
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a)
The on-spot drug testing for the amphetamines are quite common in spite they give false positive test.
This basically caused by the cross-reactivity of amphetamines with immunoassays with sympathomimetic amines with has structure similar to amphetamines Nasal decongestants like Vicks contains propanolamine ,psedoephedrine and 1-methylphetamine is the most commonest false positive for the amphetamines. Now amphetamines has most positive drug test cases and significant amount of amphetamines are present is urine excretion so most cases amphetmaines are detected using GSMS of the urine sample since d- amphetamines are the narcotics not the l isomer along with the Chiral based GCMS needs to done certain positive test for the amphetamine. So the on spot testing of amphetamines will always go wrong if the subjected person is used Vicks nasal inhaler.
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      • Illuminate\Cache\Events\CacheHit (269μs)
      • Illuminate\Cache\Events\CacheHit (172μs)
      • Illuminate\Cache\Events\CacheHit (186μs)
      • Illuminate\Cache\Events\CacheHit (160μs)
      • Illuminate\Cache\Events\CacheHit (206μs)
      • Illuminate\Cache\Events\CacheHit (161μs)
      • Illuminate\Cache\Events\CacheHit (227μs)
      • Illuminate\Cache\Events\CacheHit (249μs)
      • Illuminate\Cache\Events\CacheHit (198μs)
      • Illuminate\Cache\Events\CacheHit (157μs)
      • Illuminate\Cache\Events\CacheHit (195μs)
      • Illuminate\Cache\Events\CacheHit (234μs)
      • Illuminate\Cache\Events\CacheHit (185μs)
      • Illuminate\Cache\Events\CacheHit (154μs)
      • creating: site.layouts.app (488μs)
      • composing: site.layouts.app (24μs)
      • creating: components.canonical (423μs)
      • composing: components.canonical (105μs)
      • creating: components.open-graph (184μs)
      • composing: components.open-graph (75μs)
      • creating: site.headers.header (250μs)
      • composing: site.headers.header (72μs)
      • Illuminate\Cache\Events\CacheHit (1.62ms)
      • creating: components.footer (107μs)
      • composing: components.footer (103μs)
      • Illuminate\Cache\Events\CacheHit (877μs)
      • Illuminate\Cache\Events\CacheHit (292μs)
      • Illuminate\Cache\Events\CacheHit (260μs)
      • Illuminate\Cache\Events\CacheHit (187μs)
      • Illuminate\Cache\Events\CacheHit (179μs)
      • Illuminate\Cache\Events\CacheHit (176μs)
      • Illuminate\Cache\Events\CacheHit (176μs)
      • Illuminate\Cache\Events\CacheHit (284μs)
      • Illuminate\Cache\Events\CacheHit (308μs)
      • Illuminate\Cache\Events\CacheHit (195μs)
      • Illuminate\Cache\Events\CacheHit (187μs)
      • Illuminate\Cache\Events\CacheHit (181μs)
      • Illuminate\Cache\Events\CacheHit (12.5ms)
      • Illuminate\Cache\Events\CacheHit (268μs)
      • creating: components.forms.contact-us (303μs)
      • composing: components.forms.contact-us (172μs)
      • creating: components.forms.get-started (148μs)
      • composing: components.forms.get-started (71μs)
      • creating: components.forms.free-tool-download (99μs)
      • composing: components.forms.free-tool-download (62μs)
      • creating: components.forms.claim-free-worksheet (167μs)
      • composing: components.forms.claim-free-worksheet (73μs)
      • creating: components.forms.tutor-subscription-waitlist (106μs)
      • composing: components.forms.tutor-subscription-waitlist (64μs)
      • creating: components.forms.tutor-subscription-join (97μs)
      • composing: components.forms.tutor-subscription-join (63μs)
      • creating: components.forms.tutor-support (95μs)
      • composing: components.forms.tutor-support (65μs)
      • 315 x Illuminate\Cache\Events\CacheHit (23.55%)
        121ms
        16 x Illuminate\Database\Events\StatementPrepared (9.54%)
        48.79ms
        16 x Illuminate\Database\Events\QueryExecuted (5.17%)
        26.48ms
        7 x Illuminate\Cache\Events\CacheMissed (1.35%)
        6.90ms
        1 x Illuminate\Foundation\Events\LocaleUpdated (0.92%)
        4.70ms
        7 x Illuminate\Cache\Events\KeyWritten (0.68%)
        3.49ms
        8 x eloquent.retrieved: App\Models\SubjectCat (0.16%)
        825μs
        1 x Illuminate\Routing\Events\Routing (0.15%)
        791μs
        1 x Illuminate\Database\Events\ConnectionEstablished (0.14%)
        724μs
        1 x Illuminate\Routing\Events\RouteMatched (0.1%)
        516μs
        1 x creating: site.layouts.app (0.1%)
        488μs
        1 x creating: components.canonical (0.08%)
        423μs
        1 x creating: components.forms.contact-us (0.06%)
        303μs
        1 x eloquent.booting: App\Models\SubjectCat (0.06%)
        286μs
        1 x creating: homework.show (0.05%)
        272μs
        1 x eloquent.booting: App\Models\HomeworkLibrary\HomeworkLibrary (0.05%)
        268μs
        7 x eloquent.retrieved: App\Models\HomeworkLibrary\HomeworkLibrary (0.05%)
        265μs
        1 x creating: site.headers.header (0.05%)
        250μs
        1 x creating: components.breadcrumbs (0.05%)
        233μs
        1 x eloquent.booting: App\Models\Subject (0.04%)
        213μs
        2 x eloquent.retrieved: App\Models\Subject (0.04%)
        196μs
        1 x creating: components.open-graph (0.04%)
        184μs
        1 x composing: components.forms.contact-us (0.03%)
        172μs
        1 x creating: components.forms.claim-free-worksheet (0.03%)
        167μs
        1 x eloquent.booted: App\Models\HomeworkLibrary\HomeworkLibrary (0.03%)
        165μs
        5 x eloquent.retrieved: App\Models\HomeworkLibrary\HomeworkLibraryFile (0.03%)
        155μs
        1 x creating: components.forms.get-started (0.03%)
        148μs
        1 x creating: components.footer (0.02%)
        107μs
        1 x eloquent.booting: App\Models\HomeworkLibrary\HomeworkLibraryFile (0.02%)
        106μs
        1 x creating: components.forms.tutor-subscription-waitlist (0.02%)
        106μs
        1 x composing: components.canonical (0.02%)
        105μs
        1 x composing: components.footer (0.02%)
        103μs
        1 x creating: components.forms.free-tool-download (0.02%)
        99μs
        1 x creating: components.forms.tutor-subscription-join (0.02%)
        97μs
        1 x creating: components.forms.tutor-support (0.02%)
        95μs
        1 x composing: components.breadcrumbs (0.02%)
        91μs
        1 x composing: homework.show (0.02%)
        85μs
        1 x composing: components.open-graph (0.01%)
        75μs
        1 x composing: components.forms.claim-free-worksheet (0.01%)
        73μs
        1 x composing: site.headers.header (0.01%)
        72μs
        1 x composing: components.forms.get-started (0.01%)
        71μs
        1 x composing: components.forms.tutor-support (0.01%)
        65μs
        1 x composing: components.forms.tutor-subscription-waitlist (0.01%)
        64μs
        1 x composing: components.forms.tutor-subscription-join (0.01%)
        63μs
        1 x composing: components.forms.free-tool-download (0.01%)
        62μs
        1 x eloquent.booted: App\Models\Subject (0.01%)
        44μs
        1 x eloquent.booted: App\Models\SubjectCat (0.01%)
        42μs
        1 x eloquent.booted: App\Models\HomeworkLibrary\HomeworkLibraryFile (0.01%)
        41μs
        1 x composing: site.layouts.app (0%)
        24μs
      14 templates were rendered
      • 1x homework.showshow.blade.phpblade
      • 1x components.breadcrumbsbreadcrumbs.blade.phpblade
      • 1x site.layouts.appapp.blade.phpblade
      • 1x components.canonicalcanonical.blade.phpblade
      • 1x components.open-graphopen-graph.blade.phpblade
      • 1x site.headers.headerheader.blade.phpblade
      • 1x components.footerfooter.blade.phpblade
      • 1x components.forms.contact-uscontact-us.blade.phpblade
      • 1x components.forms.get-startedget-started.blade.phpblade
      • 1x components.forms.free-tool-downloadfree-tool-download.blade.phpblade
      • 1x components.forms.claim-free-worksheetclaim-free-worksheet.blade.phpblade
      • 1x components.forms.tutor-subscription-waitlisttutor-subscription-waitlist.blade.phpblade
      • 1x components.forms.tutor-subscription-jointutor-subscription-join.blade.phpblade
      • 1x components.forms.tutor-supporttutor-support.blade.phpblade
      uri
      GET college-homework-library/{category}/{subject}/{id}
      middleware
      web, utm.parameters
      controller
      App\Http\Controllers\HomeworkLibraryController@show
      namespace
      where
      as
      homework.show
      file
      app/Http/Controllers/HomeworkLibraryController.php:79-176
      16 statements were executed, 4 of which were duplicates, 12 unique. Show only duplicated62.23ms
      • Connection Establishedtwenty4_siteHomeworkLibraryController.php#91
        Backtrace
        • 13. app/Http/Controllers/HomeworkLibraryController.php:91
        • 14. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 15. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 16. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 17. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select * from `solutionslibrary` where `status` = 'published' and `price` > 0 and `solutionslibrary`.`id` = '16442' limit 1
        12.09mstwenty4_siteHomeworkLibraryController.php#97
        Bindings
        • 0: published
        • 1: 0
        • 2: 16442
        Backtrace
        • 16. app/Http/Controllers/HomeworkLibraryController.php:97
        • 17. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 18. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 19. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 20. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select * from `subjects` where `subjects`.`id` in (159)
        1.01mstwenty4_siteHomeworkLibraryController.php#97
        Backtrace
        • 21. app/Http/Controllers/HomeworkLibraryController.php:97
        • 22. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 23. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 24. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 25. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select * from `solutionslibrary_files` where `solutionslibrary_files`.`solutionlib_id` in (16442)
        920μstwenty4_siteHomeworkLibraryController.php#97
        Backtrace
        • 21. app/Http/Controllers/HomeworkLibraryController.php:97
        • 22. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 23. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 24. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 25. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select * from `subject_cats` where `subject_cats`.`id` = 36 limit 1
        1.09mstwenty4_siteHomeworkLibrary.php#201
        Bindings
        • 0: 36
        Backtrace
        • 20. app/Models/HomeworkLibrary/HomeworkLibrary.php:201
        • 26. app/Http/Controllers/HomeworkLibraryController.php:105
        • 27. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 28. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 29. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
      • select * from `solutionslibrary` where `id` <> 16442 and `subject` = 159 and `status` = 'published' and `price` > 0 order by RAND() limit 6
        3.31mstwenty4_siteHomeworkLibraryRepository.php#30
        Bindings
        • 0: 16442
        • 1: 159
        • 2: published
        • 3: 0
        Backtrace
        • 14. app/Repositories/HomeworkLibraryRepository.php:30
        • 15. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 16. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 18. app/Repositories/HomeworkLibraryRepository.php:39
        • 19. app/Http/Controllers/HomeworkLibraryController.php:139
      • select * from `subjects` where `subjects`.`id` in (159)
        1.13mstwenty4_siteHomeworkLibraryRepository.php#30
        Backtrace
        • 19. app/Repositories/HomeworkLibraryRepository.php:30
        • 20. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 21. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 23. app/Repositories/HomeworkLibraryRepository.php:39
        • 24. app/Http/Controllers/HomeworkLibraryController.php:139
      • select * from `solutionslibrary_files` where `solutionslibrary_files`.`solutionlib_id` = 16442 and `solutionslibrary_files`.`solutionlib_id` is not null and `publish` = 'question' order by `order` asc, `id` asc
        950μstwenty4_siteHomeworkLibrary.php#260
        Bindings
        • 0: 16442
        • 1: question
        Backtrace
        • 15. app/Models/HomeworkLibrary/HomeworkLibrary.php:260
        • 16. app/Transformers/HomeworkLibrary/HomeworkLibraryTransformer.php:58
        • 19. vendor/league/fractal/src/TransformerAbstract.php:128
        • 20. vendor/league/fractal/src/TransformerAbstract.php:107
        • 21. vendor/league/fractal/src/Scope.php:383
      • select * from `solutionslibrary_files` where `solutionslibrary_files`.`solutionlib_id` = 16442 and `solutionslibrary_files`.`solutionlib_id` is not null and `publish` = 'teaser' order by `order` asc, `id` asc
        860μstwenty4_siteHomeworkLibrary.php#260
        Bindings
        • 0: 16442
        • 1: teaser
        Backtrace
        • 15. app/Models/HomeworkLibrary/HomeworkLibrary.php:260
        • 16. app/Transformers/HomeworkLibrary/HomeworkLibraryTransformer.php:69
        • 19. vendor/league/fractal/src/TransformerAbstract.php:128
        • 20. vendor/league/fractal/src/TransformerAbstract.php:107
        • 21. vendor/league/fractal/src/Scope.php:383
      • select * from `solutionslibrary_files` where `solutionslibrary_files`.`solutionlib_id` = 16442 and `solutionslibrary_files`.`solutionlib_id` is not null and `publish` = 'solution' order by `order` asc, `id` asc
        890μstwenty4_siteHomeworkLibrary.php#260
        Bindings
        • 0: 16442
        • 1: solution
        Backtrace
        • 15. app/Models/HomeworkLibrary/HomeworkLibrary.php:260
        • 16. app/Transformers/HomeworkLibrary/HomeworkLibraryTransformer.php:80
        • 19. vendor/league/fractal/src/TransformerAbstract.php:128
        • 20. vendor/league/fractal/src/TransformerAbstract.php:107
        • 21. vendor/league/fractal/src/Scope.php:383
      • select * from `subject_cats` where `subject_cats`.`id` = 36 limit 1
        1.18mstwenty4_siteHomeworkLibrary.php#201
        Bindings
        • 0: 36
        Backtrace
        • 20. app/Models/HomeworkLibrary/HomeworkLibrary.php:201
        • 32. vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:110
        • 33. vendor/laravel/framework/src/Illuminate/View/Engines/PhpEngine.php:58
        • 34. vendor/livewire/livewire/src/ComponentConcerns/RendersLivewireComponents.php:69
        • 35. vendor/laravel/framework/src/Illuminate/View/Engines/CompilerEngine.php:70
      • select * from `subject_cats` where `subject_cats`.`id` = 10 limit 1
        9.17mstwenty4_siteSubject.php#100
        Bindings
        • 0: 10
        Backtrace
        • 18. app/Models/Subject.php:100
        • 19. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 20. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 22. app/Models/Subject.php:101
        • 34. vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:110
      • select * from `subject_cats` where `subject_cats`.`id` = 33 limit 1
        2.37mstwenty4_siteSubject.php#100
        Bindings
        • 0: 33
        Backtrace
        • 18. app/Models/Subject.php:100
        • 19. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 20. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 22. app/Models/Subject.php:101
        • 34. vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:110
      • select * from `subject_cats` where `subject_cats`.`id` = 11 limit 1
        9.24mstwenty4_siteSubject.php#100
        Bindings
        • 0: 11
        Backtrace
        • 18. app/Models/Subject.php:100
        • 19. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 20. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 22. app/Models/Subject.php:101
        • 34. vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:110
      • select * from `subject_cats` where `subject_cats`.`id` = 5 limit 1
        11.32mstwenty4_siteSubject.php#100
        Bindings
        • 0: 5
        Backtrace
        • 18. app/Models/Subject.php:100
        • 19. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 20. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 22. app/Models/Subject.php:101
        • 34. vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:110
      • select * from `subject_cats` where `subject_cats`.`id` = 34 limit 1
        1.25mstwenty4_siteSubject.php#100
        Bindings
        • 0: 34
        Backtrace
        • 18. app/Models/Subject.php:100
        • 19. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 20. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 22. app/Models/Subject.php:101
        • 34. vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:110
      • select * from `subject_cats` where `subject_cats`.`id` = 31 limit 1
        5.45mstwenty4_siteSubject.php#100
        Bindings
        • 0: 31
        Backtrace
        • 18. app/Models/Subject.php:100
        • 19. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:397
        • 20. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:419
        • 22. app/Models/Subject.php:101
        • 34. vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:110
      App\Models\SubjectCat
      8SubjectCat.php
      App\Models\HomeworkLibrary\HomeworkLibrary
      7HomeworkLibrary.php
      App\Models\HomeworkLibrary\HomeworkLibraryFile
      5HomeworkLibraryFile.php
      App\Models\Subject
      2Subject.php
          _token
          6yxKqsdCH2DM9lSsVE49PlPdrbR9GoYu3oZGoNZ1
          utm_source
          direct
          redirectUrl
          /college-homework-library/Chemistry/Analytical-Chemistry/16442
          _previous
          array:1 [ "url" => "https://staging.dev.24houranswers.com/college-homework-library/Chemistry/Analy...
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          array:2 [ "old" => [] "new" => [] ]
          PHPDEBUGBAR_STACK_DATA
          []
          path_info
          /college-homework-library/Chemistry/Analytical-Chemistry/16442
          status_code
          200
          
          status_text
          OK
          format
          html
          content_type
          text/html; charset=UTF-8
          request_query
          []
          
          request_request
          []
          
          request_headers
          0 of 0
          array:21 [ "priority" => array:1 [ 0 => "u=0, i" ] "accept-encoding" => array:1 [ 0 => "gzip, deflate, br, zstd" ] "sec-fetch-dest" => array:1 [ 0 => "document" ] "sec-fetch-user" => array:1 [ 0 => "?1" ] "sec-fetch-mode" => array:1 [ 0 => "navigate" ] "sec-fetch-site" => array:1 [ 0 => "none" ] "accept" => array:1 [ 0 => "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7" ] "user-agent" => array:1 [ 0 => "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)" ] "upgrade-insecure-requests" => array:1 [ 0 => "1" ] "sec-ch-ua-platform" => array:1 [ 0 => ""Windows"" ] "sec-ch-ua-mobile" => array:1 [ 0 => "?0" ] "sec-ch-ua" => array:1 [ 0 => ""Chromium";v="130", "HeadlessChrome";v="130", "Not?A_Brand";v="99"" ] "cache-control" => array:1 [ 0 => "no-cache" ] "pragma" => array:1 [ 0 => "no-cache" ] "x-amzn-trace-id" => array:1 [ 0 => "Root=1-68192fb0-22cfdfee366223fe4bea95ca" ] "host" => array:1 [ 0 => "staging.dev.24houranswers.com" ] "x-forwarded-port" => array:1 [ 0 => "443" ] "x-forwarded-proto" => array:1 [ 0 => "https" ] "x-forwarded-for" => array:1 [ 0 => "3.142.240.117" ] "content-length" => array:1 [ 0 => "" ] "content-type" => array:1 [ 0 => "" ] ]
          request_cookies
          []
          
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