Keywords

Calcium

Keyword Definition

Calcium

Category: Analysed quantities

Subcategory: Element

Keywords corresponding to analysed quantities.  The types of analysed quantities have been grouped into eleven different subcategories.Examples: “Au”, “pH”.Taken from the “Analytical_Quantities_SHARED” database table.  The subcategories are taken from the “Analytical_Quantity_Types_SHARED” database table.

Index Group Name Decomposition Technique
1    Ca | - | -    
2    Ca | NONE | SPEC   None   Spectroscopy
3    Ca | NONE | ABSORP   None   Absorption
4    Ca | NONE | EMISS   None   Emission
5    Ca | NONE | AAS-FLAME-6   None   C2H2/Air
6    Ca | NONE | INAA   None   Instrumental neutron activation analysis
7    Ca | NONE | ICP-ES   None   IC plasma – emission spectroscopy
8    Ca | NONE | Powder D-C   None   Powder D-C Arc
9    Ca | NONE | pXRF   None   pXRF
10    Ca | NONE | ICP-ES/AAS   None   ICP-AES and AAS
11    Ca | NONE | MULTIPLE   None   Multiple
12    Ca | STR ACID | ICP-ES   Strong Acid   IC plasma – emission spectroscopy
13    Ca | AR | ROOT   Aqua Regia (sensu lato)   Technique
14    Ca | AR | FLUOR   Aqua Regia (sensu lato)   Fluorescence
15    Ca | AR | ICP-ES   Aqua Regia (sensu lato)   IC plasma – emission spectroscopy
16    Ca | AR | ICP-MS   Aqua Regia (sensu lato)   IC plasma / mass spectrometry
17    Ca | AR (ss) | ICP-ES   Aqua Regia (sensu stricto)   IC plasma – emission spectroscopy
18    Ca | 4-acid | ICP-ES   4-acid   IC plasma – emission spectroscopy
19    Ca | AR (Acme[1]) | ICP-MS   Aqua regia (Acme[1])   IC plasma / mass spectrometry
20    Ca | AR (Acme[1]) | ICP-MS/ES   Aqua regia (Acme[1])   ICP-MS and ICP-ES
21    Ca | 4-acid (Acme) | ICP-MS   Four-acid (Acme)   IC plasma / mass spectrometry
22    Ca | Unknown | ICP-MS   Unknown   IC plasma / mass spectrometry
23    Ca | BO2/B4O7 | Powder D-C   Borate and/or tetraborate   Powder D-C Arc
24    Ca | Aqua regia (NASGLP) | ICP-MS/ES   Aqua regia (NASGLP)   ICP-MS and ICP-ES
25    Ca | Water | ICP-MS/ES   Water   ICP-MS and ICP-ES
26    Ca | HF-HCl-HClO4 | ICP-ES   3 acid mixture   IC plasma – emission spectroscopy
27    Ca | AR (BVM) | ICP-MS   Aqua regia (BVM)   IC plasma / mass spectrometry
28    Ca | AR (Acme[2]) | ICP-MS   Aqua regia (Acme[2])   IC plasma / mass spectrometry
29    Ca | Multiple | INA/ICP-MS   Multiple   INAA and ICP-MS
30    Ca | Multiple | MULTIPLE   Multiple   Multiple
ID Units Det. Limit Technique Decomposition
1    ppm 0.5   IC plasma – emission spectroscopy   None
2    ppm 0.2   C2H2/Air   None
3    ppm 0.5   C2H2/Air   None
4    ppm   ICP-AES and AAS   None
5    percent 1   Instrumental neutron activation analysis   None
6    ppm 0.2   IC plasma – emission spectroscopy   None
7    ppm   Spectroscopy   None
8    ppm 0.02   IC plasma – emission spectroscopy   None
9    percent 1   Instrumental neutron activation analysis   None
10    percent 0.01   Fluorescence   Aqua Regia (sensu lato)
11    percent 0.01   Technique   Aqua Regia (sensu lato)
12    percent 0.01   Technique   Aqua Regia (sensu lato)
13    percent 0.01   IC plasma – emission spectroscopy   Aqua Regia (sensu lato)
14    percent 1   Instrumental neutron activation analysis   None
15    percent 0.01   IC plasma – emission spectroscopy   Aqua Regia (sensu stricto)
16    percent 0.01   INAA and ICP-MS   Multiple
17    ppm 0.2   IC plasma – emission spectroscopy   None
18    ppm 0.5   Absorption   None
19    percent 0.01   ICP-MS and ICP-ES   Aqua regia (Acme[1])
20    percent 0.01   ICP-MS and ICP-ES   Aqua regia (NASGLP)
21    percent 0.01   IC plasma / mass spectrometry   Aqua Regia (sensu lato)
22    percent   IC plasma – emission spectroscopy   4-acid
23    percent   IC plasma – emission spectroscopy   Aqua Regia (sensu stricto)
24    ppm 2   ICP-MS and ICP-ES   Water
25    percent 1   Instrumental neutron activation analysis   None
26    percent 1   Instrumental neutron activation analysis   None
27    percent 1   Instrumental neutron activation analysis   None
28    percent 1   Instrumental neutron activation analysis   None
29    percent 0.01   IC plasma – emission spectroscopy   Strong Acid
30    percent 0.01   IC plasma – emission spectroscopy   Strong Acid
31    percent 0.01   IC plasma – emission spectroscopy   Strong Acid
32    percent 1   Instrumental neutron activation analysis   None
33    percent 1   Instrumental neutron activation analysis   None
34    percent 1   Instrumental neutron activation analysis   None
35    percent 0.01   IC plasma – emission spectroscopy   Aqua Regia (sensu lato)
36    percent   IC plasma – emission spectroscopy   Aqua Regia (sensu lato)
37    percent 0.01   IC plasma / mass spectrometry   Aqua regia (Acme[1])
38    percent 0.01   IC plasma – emission spectroscopy   4-acid
39    percent 0.01   IC plasma – emission spectroscopy   4-acid
40    ppm 100   IC plasma / mass spectrometry   Unknown
41    percent   Multiple   Multiple
42    percent   Multiple   Multiple
43    percent   Multiple   Multiple
44    percent   Multiple   Multiple
45    percent 0.01   IC plasma – emission spectroscopy   4-acid
46    percent 0.02   IC plasma / mass spectrometry   Four-acid (Acme)
47    ppm   pXRF   None
48    ppm 1   pXRF   None
49    ppm 1   pXRF   None
50    percent 0.01   IC plasma – emission spectroscopy   3 acid mixture
51    percent 0.01   IC plasma / mass spectrometry   Aqua regia (BVM)
52    percent 0.01   IC plasma – emission spectroscopy   Aqua Regia (sensu lato)
53    ppm   Emission   None
54    percent   Powder D-C Arc   None
55    ppm 0.1   Multiple   None
56    percent   Powder D-C Arc   Borate and/or tetraborate
57    percent 0.01   IC plasma / mass spectrometry   Aqua regia (Acme[1])
58    percent 0.2   Instrumental neutron activation analysis   None
59    percent 0.01   IC plasma / mass spectrometry   Aqua regia (Acme[2])
Index Suite ID Suite Name
1  26     XRAL INAA
2  40     ActLabs INAA (35 elements; Rb:15; Cr:5; Se:3)
3  52     ActLabs INAA (33 elements, inc Hg, no Ag, no Sr, Rb:15)
4  59     ActLabs INAA (35 elements; Rb:30)
5  60     ActLabs INAA (35 elements; Rb:15; Cr:2)
6  61     ActLabs ICP-AES (19 elements; 1999; 4-acid)
7  62     ActLabs ICP-AES (19 elements; 2001; 4-acid)
8  63     ActLabs ICP-AES (19 elements; 2002; 4-acid)
9  65     ActLabs ICP-AES (19 elements; 4-acid)
10  77     ActLabs INAA (Sr, no Ag, no Hg)
11  94     Chemex ICP-AES (Hg ppm) (32 elements)
12  95     Chemex/TSD ICP-AES/MS ? (38 elements)
13  96     Chemex/TSD ICP-AES/MS ? (24 elements)
14  97     ActLabs INAA (35 elements; Rb:5; Cr:5; Co:1)
15  99     Chemex ICP-AES (Hg ppb, Cd:0.05, La:0.5) (32 elements)
16  100     ActLabs INAA (35 elements; Rb:5; Cr:1; Co:1)
17  104     Geoscience Labs, (OGS) MRD 155, Teck-Gauthier A3, miscellaneous analytical methods
18  107     Geoscience Labs, (OGS) MRD 155,  Carscallen-Thornburn, miscellaneous analytical methods
19  108     Geoscience Labs, (OGS) MRD 155, Munroe-Currie, miscellaneous analytical methods
20  111     Geoscience Labs, (OGS) MRD 155, Ben Nevis-Katrine, miscellaneous analytical methods
21  127     McMaster University: Instrumental Neutron Activation Analysis (INAA), low detection limits
22  135     Chemex ICP-AES (Hg ppm) (33 elements)
23  137     ActLabs INAA (35 elements; Sr:200; Rb:15)
24  138     ActLabs INAA (35 elements; Rb:5; Se:5; Co:1)
25  140     Chemex ICP-AES (Hg ppb, Cd:0.5, La:10) (32 elements)
26  141     Bondar Clegg ICP-AES (38 elements)
27  156     ACME ICP-MS (Group 1F-MS Basic Suite v1, including weight; B dl=1 ppm, Ga dl=0.1 ppm, S dl=0.01%, W dl=0.1 ppm)
28  159     ActLabs ICP-AES (19 elements; 4-acid; inc Bi, ex S; Pb:5)
29  160     ActLabs ICP-AES (20 elements; 4-acid; inc Bi, S; Pb:5)
30  162     ActLabs ICP-AES (19 elements; 4-acid; inc S, ex Bi)
31  165     ActLabs INAA (33 elements, inc Hg, no Ag, no Sr, Rb:5)
32  190     Acme Group 1F-MS Basic Suite (15 grams; 37 elements; B dl=1  ppm, Ga dl=0.1ppm, S dl=0.02%, W dl=0.1 ppm) (v2)
33  192     Acme Group 1T-MS (55 elements)
34  225     Acme 1F-MS (B dl = 1 ppm; Ga dl = 0.1 ppm; S dl=0.01 %, W dl=0.1 ppm)
35  231     GSC/AMD (surface water) ICP-ES (9 elements)
36  334     ActLabs Au+48 1H ( INAA + ICP-ES)
37  369     GSC (surface water) AAS (Zn, Mn, Fe, Ca, Mg, Na, K; air-acetylene)
38  380     GSC (surface water) AAS (Zn, Mn, Fe, Ca, Mg, Na, K; air-acetylene), caesium buffer
39  396     Manitoba Gov't., Dept. of Environment (surface water) case 1: ICP (Ca, Mg), case2: AAS (Ca, Mg; air-acetylene)
40  440     Barringer (surface water) ICP (calcium)
41  459     Chemex (surface water) ICP (calcium) – d.l.= 0.5
42  462     Chemex (surface water) ICP (calcium) – d.l.= 0.2
43  468     Chemex (surface water) AAS (calcium) – d.l.= 0.5
44  471     GSC (surface water) AAS (Ca) (NGR, MB, 1985)
45  478     Bondar Clegg (surface water) ICP-ES (Ca, Mg, As, Ba, Hg, Mn, Na, Pb, Sr)
46  490     ActLabs (stream sediment) INAA (34 elements + Au + Wt) Rb, d.l.=5 ppm
47  511     ACME (stream sediment) ICP-MS / ICP-ES (35 elements, W, d.l. = 0.2 ppm)
48  519     ACME (stream sediment) ICP-MS (35 elements + Au) – details unknown
49  521     GSC (surface water) ICP-ES (7 elements)
50  523     ActLabs (stream sediment) INAA (34 elements + Au + Wt) Rb, d.l. = 15 ppm
51  525     ACME (stream  sediment) ICP-MS / ICP-ES (35 elements, (Ga, d.l.=0.1 ppm, S, d.l.=0.01%, W, d.l.=0.1 ppm ))
52  528     ACME Analytical Labs (stream sediment) ICP-MS / ICP-ES (35 elements+ Au;  Ga, d.l.=0.2ppm, W, d.l.=0.2 ppm)
53  533     ACME (stream sediment) ICP-MS / ICP-ES (35 elements, (Ga, d.l.=0.2 ppm, S, d.l.=0.01%,  W, d.l.=0.1 ppm ))
54  534     ACME (stream sediment) ICP-MS / ICP-ES (36 elements, (Ga, d.l.=0.2 ppm, S, d.l.=0.01%,  W, d.l.=0.1 ppm ))
55  540     ACME (stream sediment) ICP-MS / ICP-ES (35 elements, (Ga dl=0.1ppm, S dl=0.02%, W dl=0.1ppm))
56  542     ACME (stream sediment) ICP-MS / ICP-ES (36 elements + Au; B dl=1  ppm, Ga dl=0.2ppm, S dl=0.01 %; W dl=0.2 ppm)
57  548     ActLabs ICP-MS 59 elements (part of the Ultratrace aqua regia package) (Au dl = 0.2 ppb)
58  549     ActLabs ICP-ES 34 elements
59  559     GSC NASGLP modified EPA 3050B digestion / ICP-MS/ES
60  561     GSC NASGLP water leach ICP-MS/ES for 64 elements
61  588     ActLabs ICP-MS 59 elements (part of the Ultratrace 2 aqua regia package) (Au dl = 0.5 ppb)
62  590     ACME 1F-MS ICP-MS, aqua regia digestion (53 elements, (B dl=20 ppm, Ga dl=0.2 ppm, S dl=0.01%, W dl=0.1 ppm))
63  595     Acme Laboratories ICP-AES, 34 elements, near-total 4-acid digestion
64  596     Acme Laboratories ICP-AES, 29 elements; aqua regia digestion
65  601     ActLabs INAA (35 elements; Rb:30, Hf:0.5, Yb:0.2)
66  602     Chemex ICP-AES (Hg: 1 ppm, Cd:0.5, La:10) (32 elements)
67  619     Geoscience Labs, (OGS) MRD123 Lithogeochemical Database: ICP-MS; decomposition method unstated
68  640     pXRF (Mining Mode)
69  643     pXRF (Mining Mode), 40 elements reported
70  644     pXRF (Soil Mode), 33 elements reported
71  645     NL Geochemical Laboratory ICP-ES
72  647     BVM AQ250-EXT ICP-MS, aqua regia digestion (53 elements)
73  653     BVM AQ250 ICP-MS, aqua regia digestion (37 elements)
74  691     Acme Group 1F-MS Basic Suite (37 elements; B dl=1 ppm, Ga dl=0.2 ppm, S dl=0.01%, W dl=0.1 ppm) (v3)
75  693     ActLabs ICP-MS 59 elements (circa 2005) (Au dl = 2 ppb)
76  712     Analysis of trace elements in water by DC-arc atomic emission spectrography
77  719     GSC: direct-reading emission spectrophotometry (20 elements)
78  733     EMR: Mines Branch, Industrial Waters Section – water analysis (15 quantities) (no details given)
79  735     GSC: DROS, lithium tetraborate fusion
80  743     ACME ICP-MS (Group 1F-MS Basic Suite v4, including weight; B dl=20 ppm, Ga dl=0.1 ppm, S dl=0.02%, W dl=0.1 ppm)
81  745     ACME 1F-MS ICP-MS, aqua regia digestion (53 elements, (B dl=20 ppm, Ga dl=0.1 ppm, S dl=0.02%, W dl=0.1 ppm))
82  750     Acme/BVM VG101-EXT + REE
83  751     ActLabs INAA (34 elements, inc Hg, Ir, K, Sr, no Ag, no Sn; Rb:5)
84  752     ActLabs INAA (36 elements, inc Hg, Ir, K, Sr, Ag, Sn; Rb:5)
85  757     Acme Group 1F30 (2011-2013; 65 elements), ICP-MS
86  758     Acme Group 1T-MS (60 elements)
87  766     BVM AQ250 ICP-MS, aqua regia digestion (65 elements, V dl=1 ppm)
Index Package ID Package Name
1  3     Acme 1F-MS + LOI, Sn, F
2  6     GSC/AMD ICP-ES
3  13     XRAL INA + Hg CV-AAS
4  16     XRAL INA + Hg CV-AAS + XRF
5  24     ActLabs INAA + ICP-AES + Hg CV-AAS
6  36     ActLabs INA (33 elements) [UNUSED]
7  38     ActLabs INAA (35 elements), Hg CV-AAS,  ICP-AES (Sn)
8  40     ActLabs INAA (33 elements), Hg CV-AAS,  ICP-AES (Sn)
9  41     ActLabs INAA + ICP-AES (7 elem) + Hg CV-AAS + Sn (1991-3)
10  42     ActLabs INAA + ICP-AES (7 elem) + Hg CV-AAS + Sn (1994)
11  43     ActLabs INAA + ICP-AES (19 elem) + Hg CV-AAS + Sn
12  44     ActLabs INAA, ICP-AES, Hg CV-AAS, ICP-MS (2001)
13  45     ActLabs INAA, ICP-AES, Hg CV-AAS, ICP-MS (2002)
14  46     ActLabs INAA + ICP-AES
15  47     ActLabs INAA
16  48     ActLabs INAA + ICP-AES + Hg  ICP-AES + FIMS
17  50     ActLabs INAA + AAS + Hg-CVAAS
18  61     Chemex ICP-AES (Hg ppm)
19  63     Chemex ICP ? (1999-2000)
20  64     Chemex ICP ? (2001)
21  66     ActLabs INA (Rb:5, Cr:5)
22  67     Chemex ICP-AES (Hg ppb)
23  68     ActLabs INA (Rb:5; Cr:1)
24  83     McMaster University INAA (33 elements)
25  87     Chemex ICP-AES (Hg ppm) (33 elements)
26  89     ActLabs INA (33 elements + Ag, Sr; Sr:200)
27  91     ActLabs INAA (33 elements + Ag, Sr; Se:5)
28  93     Chemex ICP-AES (Hg ppb) (31 elements)
29  94     Bondar Clegg ICP-AES (38 elements)
30  96     Chemex ICP-AES + Hg CV-AAS
31  98     Bondar Clegg ICP-AES (38 elements) + Hg CV-AAS
32  104     OGS / MRD123 miscellaneous methods
33  107     OGS / MRD155/Teck-Gauthier A3 miscellaneous methods
34  110     OGS / MRD155/Carscallen-Thornburn  miscellaneous methods
35  111     OGS / MRD155/Munroe-Currie miscellaneous methods
36  114     OGS / MRD155/Ben Nevis-Katrine miscellaneous methods
37  120     Acme ICP-MS (1F-MS Basic Suite, with weight)
38  121     ActLabs INAA + ICP-AES + Hg CV-AAS + ICP-AES Sn fusion
39  122     ActLabs INAA + ICP-AES(20) + Hg CV-AAS + ICP-AES Sn fusion
40  124     ActLabs INAA + ICP-AES(20) + Hg CV-AAS + ICP-MS
41  126     ActLabs ICP-AES (19 elements) [UNUSED]
42  127     ActLabs INA, ICP-AES [UNUSED]
43  129     ActLabs (1H2 + 1G2) (v2) INAA + ICP-AES + ICP-MS + Hg CV-AAS FIMS
44  130     ActLabs (1H2) (v2) INAA + ICP-AES + ICP-MS
45  139     Acme 1F-MS Basic Suite (37 elements) 15g + REE
46  140     Acme 1T-MS (41 elements + 14 REEs)
47  157     Acme 1F-MS + Sn, F
48  259     GSC EPA3050B (modif) ICP-MS/ES
49  261     GSC water leach ICP-MS/ES + pH
50  275     ActLabs Ultratrace 2 – aqua regia (2010) (S dl = 0.001 %)
51  276     Acme 1F-MS (53 elements) (B dl=20 ppm, Ga dl=0.2 ppm, S dl=0.01%, W dl=0.1 ppm)
52  278     Acme ICPES near-total digestion, 34 elements
53  279     Acme ICPES aqua regia, 29 elements + 6 by hydride evolution
54  283     ActLabs INAA 35 elements
55  284     Chemex ICP-AES (Hg 1 ppm) (32 elements)
56  295     Manitoba Gov't., Dept. of Environment(NGR surface water) (Fe dl = 20 ppb)
57  300     pXRF “Mining” and “Soil” modes
58  302     pXRF “Mining” and “Soil” modes; full suites
59  303     NL Geochemical Laboratory ICP-ES analysis
60  304     BVM AQ250-EXT + REE (65 elements)
61  308     BVM combined aqua regia and borate fusion suites
62  318     BVM combined aqua regia and borate fusion suites + FA-ICPES
63  320     ActLabs ICP-MS Ultratrace – aqua regia (2004) (Au dl = 0.2 ppb)
64  321     ActLabs ICP-MS Ultratrace – aqua regia (2006) (Au dl = 0.5 ppb)
65  322     ActLabs aqua regia ICP-ES (2003)
66  326     Acme ICP-MS (1F-MS Basic Suite)
67  328     ActLabs aqua regia ICP-MS (59 elements, 2004)
68  342     Atomic emission spectrography of lake water
69  344     GSC Resource Geochemistry lake sediment analysis, Bear-Slave Operation
70  350     EMR surface water analysis
71  352     GSC lithogeochemical analysis of 22 elements
72  354     Acme ICP-MS (1F-MS Basic Suite + 4B (Sn))
73  355     Acme ICP-MS (1F 53 elements) + F (ISE) + LOI
74  357     Acme 1F-MS
75  359     Acme VG101-EXT + REE (65 elements)
76  360     ActLabs INA (34 elements)
77  361     ActLabs INA (36 elements)
78  362     Acme 4A-4B, 2A Leco, 1F30 (117 parameters)
79  363     Acme 1T-MS (46 elements + 14 REEs)
80  382     GSC (surface water) Zn, Mn, Fe, Ca, Mg, Na, K, NO3, PO4, SO4, Cl, U, F, pH, alk
81  384     GSC (NGR surface water) AAS (7)), U, C-org, Cl, Br, NO3, SO4, PO4, F, pH, alk
82  389     Manitoba Gov't., Dept. of Environment (NGR surface water) (Fe dl = 30 ppb)
83  414     Barringer (NGR surface water) LIF (U), ISE (F), pH, ICP (Ca, Mg), Alk
84  424     Chemex (NGR surface water) LIF (U), ISE (F), ICP (Ca, Mg), pH and Alk (d.l.=1)
85  425     Chemex (NGR surface water) LIF (U), ISE (F), ICP (Ca, Mg), pH and Alk (d.l.=2)
86  428     Chemex (NGR surface water) LIF (U), ISE (F), AAS (Ca, Mg), pH and Alk (d.l.=1)
87  431     GSC (NGR surface water) Ca, Mg, F, pH, Alk
88  433     Bondar Clegg (NGR surface water) ICP (9), U, F, pH, alk
89  444     ActLabs (NGR stream sediment) INAA (34 elements, Au + Wt)
90  463     Acme (NGR stream sediment) ICP-MS / ICP-ES (35 elements, W, d.l.=0.2 ppm), Sn, LOI
91  466     Acme 1F-MS Basic Suite (37 elements) 1g
92  471     Acme (NGR stream sediment) ICP-MS (35+Au), LOI
93  472     GSC (NGR surface water) ICP-MS (31 elements), ICP-ES (7 elements)
94  474     ActLabs (NGR stream sediment) INAA (34 elements, Au + Wt) (Rb, d.l.= 15)
95  476     Acme (NGR stream sediment) ICP-MS / ICP-ES (35 elements, W, d.l.=0.1 ppm), Sn, LOI
96  478     Acme (NGR stream sediment) ICP-MS/ICP-ES (35+Au), LOI
97  482     Acme (NGR stream sediment) ICP-MS / ICP-ES (35 elements), LOI, Sn, F
98  483     Acme (NGR stream sediment) ICP-MS / ICP-ES- HMC (36 elements), Sn, F
99  485     Acme (NGR stream sediment) ICP-MS / ICP-ES (35 elements, W, d.l.=0.1 ppm), LOI
100  489     Acme (NGR stream sediment) ICP-MS / ICP-ES (35 elements), LOI, Sn (LiBO2 fusion), F
101  491     Acme (NGR stream and lake sediments) ICP-MS / ICP-ES (35 elements, Ga, d.l.=0.1; S, d.l.=0.02;W, d.l.=0.1 ppm)
102  493     Acme (NGR stream sediment) ICP-MS / ICP-ES (36 elements + Au, Ga, d.l.=0.2; S, d.l.=0.01;W, d.l.=0.2 ppm)
103  497     Acme 4A-4B, 2A Leco, 1F30, 1T-MS (177 parameters)
104  498     Acme 4A-4B, 2A Leco, 1F30, 1T-MS (172 parameters)
105  500     ActLabs 1H (Au+48) and 1C-EXP2 (Au, Pt, Pd)
106  507     BVM AQ250 (65 elements)
Date modified: