Inter-comparison of NIOSH and IMPROVE protocols for OC and EC determination:
implications for inter-protocol data conversion

Wu, Cheng; Huang, X. H. Hilda; Ng, Wai Man; Griffith, Stephen M.; Yu, Jian Zhen

doi:10.5194/amt-9-4547-2016

Articles | Volume 9, issue 9

https://doi.org/10.5194/amt-9-4547-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/amt-9-4547-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 9, issue 9

Research article

|

14 Sep 2016

Research article |

| 14 Sep 2016

Inter-comparison of NIOSH and IMPROVE protocols for OC and EC determination: implications for inter-protocol data conversion

Cheng Wu, X. H. Hilda Huang, Wai Man Ng, Stephen M. Griffith, and Jian Zhen Yu

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May 2016	96	29	0	125
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Sep 2016	82	19	1	102
Oct 2016	15	7	0	22
Nov 2016	8	7	1	16
Dec 2016	8	6	0	14
Jan 2017	12	11	1	24
Feb 2017	7	2	0	9
Mar 2017	19	12	4	35
Apr 2017	18	10	2	30
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Jun 2017	15	6	0	21
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Feb 2018	10	8	0	18
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May 2018	13	13	0	26
Jun 2018	12	19	0	31
Jul 2018	6	9	0	15
Aug 2018	14	11	0	25
Sep 2018	11	11	0	22
Oct 2018	11	14	0	25
Nov 2018	15	12	0	27
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Mar 2019	11	14	1	26
Apr 2019	13	14	0	27
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Jun 2019	10	8	4	22
Jul 2019	6	12	1	19
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Jan 2020	13	12	1	26
Feb 2020	8	10	0	18
Mar 2020	8	10	0	18
Apr 2020	10	13	0	23
May 2020	9	8	0	17
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Oct 2020	12	16	0	28
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Dec 2020	18	13	0	31
Jan 2021	26	14	0	40
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Mar 2021	17	11	0	28
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May 2021	14	21	1	36
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Jan 2022	27	15	1	43
Feb 2022	26	17	2	45
Mar 2022	23	15	1	39
Apr 2022	24	17	1	42
May 2022	20	23	1	44
Jun 2022	14	13	0	27
Jul 2022	9	5	0	14
Aug 2022	24	15	1	40
Sep 2022	8	8	0	16
Oct 2022	16	15	1	32
Nov 2022	11	16	1	28
Dec 2022	32	15	1	48
Jan 2023	24	12	1	37
Feb 2023	21	17	1	39
Mar 2023	37	21	0	58
Apr 2023	11	19	0	30
May 2023	64	26	0	90
Jun 2023	65	17	1	83
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Aug 2023	42	10	3	55
Sep 2023	43	18	2	63
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Nov 2023	29	7	0	36
Dec 2023	43	4	1	48
Jan 2024	44	6	1	51
Feb 2024	47	11	2	60
Mar 2024	52	23	3	78
Apr 2024	59	15	5	79
May 2024	22	20	2	44
Jun 2024	59	10	3	72
Jul 2024	43	11	2	56
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Sep 2024	13	15	0	28
Oct 2024	22	10	1	33
Nov 2024	25	19	5	49
Dec 2024	16	10	2	28
Jan 2025	17	12	1	30
Feb 2025	30	8	1	39
Mar 2025	17	14	1	32
Apr 2025	30	16	2	48
May 2025	28	11	1	40
Jun 2025	51	14	0	65
Jul 2025	47	23	3	73
Aug 2025	61	27	4	92
Sep 2025	50	29	2	81
Oct 2025	29	22	1	52
Nov 2025	8	6	1	15

Cumulative views and downloads (calculated since 24 May 2016)

Month	HTML	PDF	XML	Total
May 2016	96	29	0	125
Jun 2016	47	16	3	66
Jul 2016	38	8	3	49
Aug 2016	23	3	0	26
Sep 2016	82	19	1	102
Oct 2016	15	7	0	22
Nov 2016	8	7	1	16
Dec 2016	8	6	0	14
Jan 2017	12	11	1	24
Feb 2017	7	2	0	9
Mar 2017	19	12	4	35
Apr 2017	18	10	2	30
May 2017	18	15	0	33
Jun 2017	15	6	0	21
Jul 2017	13	6	0	19
Aug 2017	15	16	3	34
Sep 2017	8	8	0	16
Oct 2017	6	5	0	11
Nov 2017	12	14	1	27
Dec 2017	11	12	0	23
Jan 2018	7	16	0	23
Feb 2018	10	8	0	18
Mar 2018	17	15	0	32
Apr 2018	11	8	0	19
May 2018	13	13	0	26
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Aug 2018	14	11	0	25
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Oct 2020	12	16	0	28
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Apr 2021	21	12	1	34
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Jun 2021	11	12	0	23
Jul 2021	10	10	1	21
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Feb 2022	26	17	2	45
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Nov 2022	11	16	1	28
Dec 2022	32	15	1	48
Jan 2023	24	12	1	37
Feb 2023	21	17	1	39
Mar 2023	37	21	0	58
Apr 2023	11	19	0	30
May 2023	64	26	0	90
Jun 2023	65	17	1	83
Jul 2023	57	19	1	77
Aug 2023	42	10	3	55
Sep 2023	43	18	2	63
Oct 2023	60	11	3	74
Nov 2023	29	7	0	36
Dec 2023	43	4	1	48
Jan 2024	44	6	1	51
Feb 2024	47	11	2	60
Mar 2024	52	23	3	78
Apr 2024	59	15	5	79
May 2024	22	20	2	44
Jun 2024	59	10	3	72
Jul 2024	43	11	2	56
Aug 2024	44	9	1	54
Sep 2024	13	15	0	28
Oct 2024	22	10	1	33
Nov 2024	25	19	5	49
Dec 2024	16	10	2	28
Jan 2025	17	12	1	30
Feb 2025	30	8	1	39
Mar 2025	17	14	1	32
Apr 2025	30	16	2	48
May 2025	28	11	1	40
Jun 2025	51	14	0	65
Jul 2025	47	23	3	73
Aug 2025	61	27	4	92
Sep 2025	50	29	2	81
Oct 2025	29	22	1	52
Nov 2025	8	6	1	15

Latest update: 08 Nov 2025

Short summary

Organic carbon (OC) and elemental carbon (EC) in more than 1300 Hong Kong samples were analyzed using both NIOSH TOT and IMPROVE TOR protocols. EC discrepancy between the two protocols mainly (83 %) arises from a difference in peak inert mode temperature, while the rest (17 %) is attributed to a difference in the optical method (transmittance vs. reflectance) applied for the charring correction. Two approaches are proposed to translate NIOSH TOT OC and EC data into IMPROVE TOR OC and EC data.