---
title: "Molybdenum (insoluble) (7439-98-7): sampling methods"
url: https://analyt-mtc.com/tools/hazard-search/molybdenum-insoluble-7439-98-7/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/molybdenum-insoluble-7439-98-7/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/molybdenum-insoluble-7439-98-7/
---

Hazard search

# Molybdenum (insoluble)

CAS number

7439-98-7

Also known as

Mo · Molybdenum (Elements by Cellulosic Internal Capsule Sampler) · Molybdenum (Elements by ICP Aqua Regia Ashing) · Molybdenum (Elements by ICP HNO3 Digestion) · Molybdenum (Elements by ICP HNO3/HClO4 Ashing) · Molybdenum (Elements on Wipes) · Molybdenum (soluble) · Molybdenum compounds (insoluble) (as Mo) · Molybdenum compounds (soluble) (as Mo) · Molybdenum insolubles (as Mo) · Molybdenum insolubles (as Mo) (respirable fraction) · Molybdenum solubles (as Mo)

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 8-hour TWA | 10 mg/m³ | Molybdenum (insoluble) |
| 15-minute STEL | 20 mg/m³ | Molybdenum (insoluble) |
| 8-hour TWA | 5 mg/m³ | Molybdenum (soluble) |
| 15-minute STEL | 10 mg/m³ | Molybdenum (soluble) |

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **MDHS 91/2** / Metals & metalloids by XRF / [Method document (opens in a new tab)](https://www.hse.gov.uk/pubns/mdhs/pdfs/mdhs91-2.pdf) | Active (pump) | IOM or cyclone with 0.8µm MCE filter | XRF | [225-70A](https://analyt-mtc.com/catalog/product/haz-dust-7204-particulate-monitor/#part-225-70a) / [225-1930](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-1930) |
| **NIOSH 7300** / Elements by ICP (Nitric/perchloric acid ashing) / [Method document (opens in a new tab)](http://www.cdc.gov/niosh/docs/2003-154/pdfs/7300.pdf) | Active (pump) | 0.8µm MCE filter or 5µm PVC filter in 37mm cassette | ICP-AES | [225-3-01](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3-01) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) |
| **NIOSH 7301** / Elements by ICP (Aqua regia ashing) / [Method document (opens in a new tab)](http://www.cdc.gov/niosh/docs/2003-154/pdfs/7301.pdf) | Active (pump) | 0.8µm MCE filter or 5µm PVC filter in 37mm cassette | ICP-AES | [225-3-01](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3-01) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) / [225-803](https://analyt-mtc.com/catalog/product/gla-5000-pvc-membrane-filters/#part-225-803) |
| **NIOSH 7303** / Elements by ICP (Hot block/HCl/HNO3 Digestion) / [Method document (opens in a new tab)](http://www.cdc.gov/niosh/docs/2003-154/pdfs/7303.pdf) | Active (pump) | 0.8µm MCE filter in 37mm cassette | ICP-AES | [225-3-01](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3-01) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) |
| **NIOSH 7306** / Elements by Cellulosic Internal Capsule Sampler ICP -AES / [Method document (opens in a new tab)](https://www.cdc.gov/niosh/docs/2003-154/pdfs/7306.pdf) | Active (pump) | Solu-CAP MCE Filters Preloaded in Cassettes and Cassette Holder | ICP-AES | [225-8517](https://analyt-mtc.com/catalog/product/cassette-inserts/#part-225-8517) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) |
| **NIOSH 9102** / Elements on wipes by ICP -AES / [Method document (opens in a new tab)](http://www.cdc.gov/niosh/docs/2003-154/pdfs/9102.pdf) | Surface | Wipe | ICP-AES | [225-2414](https://analyt-mtc.com/catalog/product/ghost-wipes/#part-225-2414) / [225-2415](https://analyt-mtc.com/catalog/product/ghost-wipes/#part-225-2415) |
| **OSHA 125G** / Metals & metalloid particulates by ICP / [Method document (opens in a new tab)](https://www.osha.gov/sites/default/files/methods/id125g.pdf) | Active (pump) | 0.8µm MCE filter with back-up pads |  | [225-3-01](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3-01) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) |
| **OSHA ID 121** | Active (pump) |  | AA or AES | [225-3-01](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3-01) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) / [225-503](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-503) / [225-105](https://analyt-mtc.com/catalog/product/gs-1-respirable-dust-cyclone/#part-225-105) |
| **OSHA ID 125G** | Active (pump) |  | ICP-AES | [225-3-01](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3-01) / [225-3100](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3100) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) |
| **OSHA ID-121** / Metal & metalloid particulates by AAS / [Method document (opens in a new tab)](https://www.osha.gov/sites/default/files/methods/osha-id121.pdf) | Active (pump) | 0.8µm MCE filter with back-up pads |  | [225-3-01](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3-01) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) |
| **OSHA ID-204** / Workplace Substances by X-Ray Fluorescence / [Method document (opens in a new tab)](https://www.osha.gov/sites/default/files/methods/id204.pdf) | Active (pump) | MCE or PVC filters in cassette |  |  |
| **BS ISO 15202-1: 2020** / Determination of metals and metalloids in airborne particulate matter by IC | Active (pump) | IOM with 0.8µm MCE filter |  | [225-70A](https://analyt-mtc.com/catalog/product/haz-dust-7204-particulate-monitor/#part-225-70a) / [225-1930](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-1930) |
| **BS ISO 15202-1: 2020** / Determination of metals and metalloids in airborne particulate matter by ICP | Active (pump) | IOM with 0.8µm MCE filter |  | [225-70A](https://analyt-mtc.com/catalog/product/haz-dust-7204-particulate-monitor/#part-225-70a) / [225-1930](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-1930) |

Methods and limits as published by their agencies and summarised by SKC; check the current method and the limit that applies to you before sampling.

Source: [SKC Ltd (UK), Hazard Search, used with SKC's permission (opens in a new tab)](https://www.skcltd.com/hazard-search.html); [SKC Inc. (USA), Sampling Guides, used with SKC's permission (opens in a new tab)](https://international.skcinc.com/sampling-guides/)